Save attachments without prompting.

If the 'attach_save_without_prompting' variable is set (to true), then on
saving a list of tagged attachments the user will not be prompted each time
for the name of file.

Conflicting filenames during save are also handled.

-=david=-

closes #1603

Update to latest autosetup, use @include feature

Up-to-date with Autosetup 4701f3e (2019-06-05)

Fix segfault on bounce

Fixes #1735

add missing translation file

show backtrace on segfault

Add a configure option `--backtrace` that uses libunwind to print a
basic backtrace if NeoMutt segfaults.

Co-authored-by: Pietro Cerutti <gahr@gahr.ch>

add funding details

merge Config and normal Accounts

merge: add basic notifications

 * debug: add notify level
 * add central NeoMutt object
 * add notify/observer
 * config notify
 * test: fix config tests

test: fix config tests

config notify

add notify/observer

add central NeoMutt object

debug: add notify level

merge: mime: use description if filename is missing

 * mime_lookup: use description if filename isn't useful
 * mime_lookup: use compose mailcap entries when replying

mime_lookup: use compose mailcap entries when replying

Use compose mailcap entries to format attachments when replying to a message

mime_lookup: use description if filename isn't useful

"fix" mime_lookup to also look into Description mime tags if the
filename tag doesn't come up with something useful

test: fix config_dump

merge: small fixes and tidying

 * clang-format
 * use enum return value
 * test: fix lcov out-of-tree build
 * test: boolify test_mutt_pattern_comp()
 * refactor: replace ctime() with strftime()
 * bug: prevent unterminated string
 * check range of uuencoded char
 * log failed atoi() calls
 * fix buffer handling
 * restore randomness to mutt_buffer_mktemp_full()
 * check state buffer
 * check for overflow in mutt_edit_content_type()
 * reduce scope of variables
 * add/remove checks
 * use param, not global, in prereq()
 * add brackets to clarify logic
 * misc small changes

misc small changes

- Initialise some variables
- Fix some formatting strings
- Remove unused variables

add brackets to clarify logic

use param, not global, in prereq()

The test function prereq() wasn't using the Context parameter, but the
Context global.

add/remove checks

Some functions needed checks.
Some others had redundant checks.

reduce scope of variables

check for overflow in mutt_edit_content_type()

Thanks to lgtm.com

check state buffer

Coverity: CID 186614

restore randomness to mutt_buffer_mktemp_full()

Coverity: CID 189775

fix buffer handling

Coverity: CID 197580, 198376, 198378, 198379

log failed atoi() calls

Coverity: CID 198492, 198493

check range of uuencoded char

Coverity: CID 180829

bug: prevent unterminated string

Coverity: CID 83483

refactor: replace ctime() with strftime()

ctime() is marked obsolete in POSIX:2008.
It's recommended to use strftime() instead.

Thanks to lgtm.com

test: boolify test_mutt_pattern_comp()

test: fix lcov out-of-tree build

use enum return value

- mutt_check_mime_type()
- mutt_lookup_mime_type()

clang-format

travis: workaround locale problems

merge: improve date tests

 * date: move defines, so they can be used for testing
 * test: improve test_mutt_date_add_timeout()
 * test: improve test_mutt_date_check_month()
 * test: improve test_mutt_date_gmtime()
 * test: improve test_mutt_date_is_day_name()
 * test: improve test_mutt_date_local_tz()
 * test: improve test_mutt_date_localtime()
 * test: improve test_mutt_date_localtime_format()
 * test: improve test_mutt_date_make_date()
 * test: improve test_mutt_date_make_imap()
 * test: improve test_mutt_date_make_time()
 * test: improve test_mutt_date_make_tls()
 * test: improve test_mutt_date_normalize_time()
 * test: improve test_mutt_date_parse_date()
 * test: improve test_mutt_date_parse_imap()

test: improve test_mutt_date_parse_imap()

test: improve test_mutt_date_parse_date()

test: improve test_mutt_date_normalize_time()

test: improve test_mutt_date_make_tls()

test: improve test_mutt_date_make_time()

test: improve test_mutt_date_make_imap()

test: improve test_mutt_date_make_date()

test: improve test_mutt_date_localtime_format()

test: improve test_mutt_date_localtime()

test: improve test_mutt_date_local_tz()

test: improve test_mutt_date_is_day_name()

test: improve test_mutt_date_gmtime()

test: improve test_mutt_date_check_month()

test: improve test_mutt_date_add_timeout()

date: move defines, so they can be used for testing

merge: improve list tests

 * test: ignore mutt_exit()
 * test: add shared list testing code
 * test: improve test_mutt_list_clear()
 * test: improve test_mutt_list_compare()
 * test: improve test_mutt_list_find()
 * test: improve test_mutt_list_free()
 * test: improve test_mutt_list_free_type()
 * test: improve test_mutt_list_insert_after()
 * test: improve test_mutt_list_insert_head()
 * test: improve test_mutt_list_insert_tail()
 * test: improve test_mutt_list_match()

test: improve test_mutt_list_match()

test: improve test_mutt_list_insert_tail()

test: improve test_mutt_list_insert_head()

test: improve test_mutt_list_insert_after()

test: improve test_mutt_list_free_type()

test: improve test_mutt_list_free()

test: improve test_mutt_list_find()

test: improve test_mutt_list_compare()

test: improve test_mutt_list_clear()

test: add shared list testing code

test: ignore mutt_exit()

doc: add example to find all maildir mailboxes

test: fix test failures

Fix list-reply regression introduced when converting Address to TAILQ

Fixes #1724

make OP_HALF_{UP,DOWN} behave symmetric.

  - the calculation of number of lines to scroll up/down should not
  depend on whether the number of rows in the pager/index/terminal is
  odd or even.
  - this patch will make the behaviour symmetric such that in both cases
  (even/odd number of rows) scrolling up and down by half a page (or the
  other way round) will get you back to the exact same line as before.

merge: improve string tests

 * test: improve test_mutt_str_adjust()
 * test: improve test_mutt_str_append_item()
 * test: improve test_mutt_str_asprintf()
 * test: improve test_mutt_str_dequote_comment()
 * test: improve test_mutt_str_find_word()
 * test: improve test_mutt_str_getenv()
 * test: improve test_mutt_str_inline_replace()
 * test: improve test_mutt_str_is_ascii()
 * test: improve test_mutt_str_is_email_wsp()
 * test: improve test_mutt_str_lws_len()
 * test: improve test_mutt_str_lws_rlen()
 * test: improve test_mutt_str_next_word()
 * test: improve test_mutt_str_pretty_size()
 * test: improve test_mutt_str_remall_strcasestr()
 * test: improve test_mutt_str_remove_trailing_ws()
 * test: improve test_mutt_str_replace()
 * test: improve test_mutt_str_rstrnstr()
 * test: improve test_mutt_str_skip_email_wsp()
 * test: improve test_mutt_str_skip_whitespace()
 * test: improve test_mutt_str_split()
 * test: improve test_mutt_str_startswith()
 * test: improve test_mutt_str_strcasecmp()
 * test: improve test_mutt_str_strcasestr()
 * test: improve test_mutt_str_strcat()
 * test: improve test_mutt_str_strchrnul()
 * test: improve test_mutt_str_strcmp()
 * test: improve test_mutt_str_strcoll()
 * test: improve test_mutt_str_strdup()
 * test: improve test_mutt_str_strfcpy()
 * test: improve test_mutt_str_stristr()
 * test: improve test_mutt_str_strlen()
 * test: improve test_mutt_str_strlower()
 * test: improve test_mutt_str_strncasecmp()
 * test: improve test_mutt_str_strncat()
 * test: improve test_mutt_str_strncmp()
 * test: improve test_mutt_str_strnfcpy()
 * test: improve test_mutt_str_substr_cpy()
 * test: improve test_mutt_str_substr_dup()
 * test: improve test_mutt_str_word_casecmp()

test: improve test_mutt_str_word_casecmp()

test: improve test_mutt_str_substr_dup()

test: improve test_mutt_str_substr_cpy()

test: improve test_mutt_str_strnfcpy()

test: improve test_mutt_str_strncmp()

test: improve test_mutt_str_strncat()

test: improve test_mutt_str_strncasecmp()

test: improve test_mutt_str_strlower()

test: improve test_mutt_str_strlen()

test: improve test_mutt_str_stristr()

test: improve test_mutt_str_strfcpy()

test: improve test_mutt_str_strdup()

test: improve test_mutt_str_strcoll()

test: improve test_mutt_str_strcmp()

test: improve test_mutt_str_strchrnul()

test: improve test_mutt_str_strcat()

test: improve test_mutt_str_strcasestr()

test: improve test_mutt_str_strcasecmp()

test: improve test_mutt_str_startswith()

test: improve test_mutt_str_split()

test: improve test_mutt_str_skip_whitespace()

test: improve test_mutt_str_skip_email_wsp()

test: improve test_mutt_str_rstrnstr()

test: improve test_mutt_str_replace()

test: improve test_mutt_str_remove_trailing_ws()

test: improve test_mutt_str_remall_strcasestr()

test: improve test_mutt_str_pretty_size()

test: improve test_mutt_str_next_word()

test: improve test_mutt_str_lws_rlen()

test: improve test_mutt_str_lws_len()

test: improve test_mutt_str_is_email_wsp()