API Error page support for Security controller errors
Merge pull request #1007 from tractorcow/pulls/3.1-security-errorpage

API Error page support for Security controller errors
API Update ErrorPage to respect new HTTP Error codes
Merge pull request #1006 from tractorcow/pulls/3.1-http-error-codes

API Update ErrorPage to respect new HTTP Error codes
Updated translation masters
Merge remote-tracking branch 'origin/3.1'