[dovecot/core] db5fdf: lib-storage: Use MAILDIR_INFO_SEP_S

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: db5fdf605555d43ca7abeaeb9cba0dcb178f2688
      https://github.com/dovecot/core/commit/db5fdf605555d43ca7abeaeb9cba0dcb178f2688
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2016-10-16 (Sun, 16 Oct 2016)

  Changed paths:
    M src/lib-storage/index/maildir/maildir-sync-index.c
    M src/lib-storage/index/maildir/maildir-uidlist.c

  Log Message:
  -----------
  lib-storage: Use MAILDIR_INFO_SEP_S

Replace hardcoded : with MAILDIR_INFO_SEP_S