formatting: src/a*.c - d*.c continuation lines

formatting: src/a*.c - d*.c continuation lines

Mostly && and || at end of the first half of a continued line rather
than at the start of the second half.  The automated reformat got
confused by comments in the midst of such lines.
  foo ||
  bar
was converted to
  foo
  || bar
but
  foo ||
  /* comment */
  bar
stayed as is.

Some excluded code [#if 0] was also manually reformatted, but this is
mainly stuff that can be found via regexp '[&|?:][ \t]*$' (with a lot
of false hits for labels whose colon ends their line).