www/joomla{15,25}: mark FORBIDDEN and DEPRECATED

Joomla 1.5 was end of life in September 2012
Joomla 2.5 was end of life in December 2014

Reference: https://docs.joomla.org/What_version_of_Joomla!_should_you_use

PR: 203995
Submitted by: Torsten Zuhlsdorff <ports@toco-domains.de> (original patch)
Approved by: maintainer timeouts (2 weeks)
Security: CVE-2014-6632
Security: CVE-2014-7228
Security: CVE-2014-7229
Security: https://vuxml.FreeBSD.org/freebsd/cec4d01a-7ac5-11e5-b35a-002590263bf5.html
Security: https://vuxml.FreeBSD.org/freebsd/beb3d5fc-7ac5-11e5-b35a-002590263bf5.html
MFH: 2015Q4