bug #5297 :   The error code is now encoded for HTML before using it as a key of an error message
bug #5297 :   Fix bug #5298
bug #5297 :   Fix bug #5299
bug #5297 :   Fix the bug #5300
Merge branch 'bug-5297' of git://github.com/mmoqui/Silverpeas-Core into mmoqui-bug-5297
Bug #5299 : XSS prevention.
Merge branch 'mmoqui-bug-5297' into core-5.13.x