[dovecot/core] 1e88ab: imapc: Use UID SEARCH instead of SEARCH

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 1e88ab82d698707d79c60c73872bd901a30bc50e
      https://github.com/dovecot/core/commit/1e88ab82d698707d79c60c73872bd901a30bc50e
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2017-04-25 (Tue, 25 Apr 2017)

  Changed paths:
    M src/lib-storage/index/imapc/imapc-search.c

  Log Message:
  -----------
  imapc: Use UID SEARCH instead of SEARCH

UIDs work better for some broken IMAP servers, so it's safer to use it.

Keep using sequences for ESEARCH, since servers supporting it aren't at
least yet known to be broken and the search result with sequences is
smaller.