Merge r1663647, r1679181, r1679182 from trunk:

* mod_authn_dbd: apr_pstrdup dbd_password and dbd_hash to fix use-after-free
bug with postgresql


mod_authn_dbd, mod_authz_dbd, mod_session_dbd, mod_rewrite: Fix lifetime
of DB lookup entries independently of the selected DB engine.  PR 46421.

Suggested by: Michel Stam <michel reverze net>
Proposed by: Steven whitson <steven.whitson gmail com>
Reviewed/Extended/Committed by: ylavic


Follup up to r1679181: CHANGES entry.
Submitted by: jkaluza, ylavic, ylavic
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1681107 13f79535-47bb-0310-9956-ffa450edef68