Bug 750622 - Fix Coverity (11104) Resource leak:
ids_sasl_user_to_entry (slapd/saslbind.c)
https://bugzilla.redhat.com/show_bug.cgi?id=750622
Bug Description: sasl_map_domap allocates strings for "base" and
"filter" in it; the caller ids_sasl_user_to_entry releases them
only when the function returns non-0 regexmatch (matched), but
even if the return value is 0 (did not match), the strings are
allocated.
Fix Description: underlying function sasl_map_check frees "base"
and "filter" if mapping did not match.
(cherry picked from commit 6af5ece3ca029271f2b2180c24bad546e2d64c45)