Purify text params
Do not ask purifier to validate my inputs
Merge remote-tracking branch 'dev/3694_fix_requesthelp_vulnerabilities' into stable

* dev/3694_fix_requesthelp_vulnerabilities:
  Do not ask purifier to validate my inputs
  Purify text params

Change-Id: I588a43ce1005977116bbe604e779ff0d1214f97d
This is Tuleap 6.2.99.2

Change-Id: I666b926f9d04a69012c4c700a2419425ba43cbce