[1.5.x] Fixed #16992 -- Added InnoDB warning regarding reuse of AUTO_INCREMENT values.

Thanks kent at nsc.liu.se for the report.

Backport of c54fa1a7bc from master
[1.5.x] Fixed #20005 -- Documented that Oracle databases need execute permission on SYS.DBMS_LOB.

Thanks jafula for the suggestion.

Backport of a86ecc80a2 from master
[1.5.x] Fixed #20707 -- Added explicit quota assignment to Oracle test user
To enable testing on Oracle 12c
[1.5.x] Fixed #21075 - Improved doc for calling call_command with arguments.

Backport of fca4c4826e from master
[1.5.x] Prevented arbitrary file inclusion with {% ssi %} tag and relative paths.

Thanks Rainer Koirikivi for the report and draft patch.

This is a security fix; disclosure to follow shortly.

Backport of 7fe5b656c9 from master
[1.5.x] Added 1.4.7/1.5.3 release notes

Backport of baec6a26dd from master
[1.5.x] Bump version numbers for 1.5.3 security release.