Merge r1795834, r1828912, r1830943, r1830944, r1832991 from trunk:

Merge r1795834, r1828912, r1830943, r1830944, r1832991 from trunk:

Remove empty line.

* modules/ssl/ssl_util.c (ssl_util_vhostid): Simplify code,
  no functional change.

Save a few cycles and simlify code.

Use apr_pstrmemdup instead of apr_pstrndup when possible.
Avoid scanning the first 2 bytes when looking for the | delimiter. it is known to be "${".
Avoid comma separated statements, it is not that usual.

Save a few cycles.

Use apr_pstrmemdup instead of apr_pstrndup when possible.

* modules/proxy/mod_proxy_hcheck.c (sctx_t, hc_create_config):
  Remove unused bucket allocator created off pconf.
  Tag the subpool.

Submitted by: jailletc36, jorton, jailletc36, jailletc36, jorton
Reviewed by: jailletc36, covener, jim

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1834844 13f79535-47bb-0310-9956-ffa450edef68