[MERGE] [FIX] html_sanitize: partial backport of trunk revision 5047 (opw 603452). Unescape elements that have been wrongly escaped.
[MERGE] [FIX] html_sanitize: partial backport of trunk revision 5047 (opw 603452).
Unescape elements that have been wrongly escaped.

Some elements (eg: 'href' tag in links) are sanitised in templates which prevents the execution of mako templates.

akretion/openerp-server,akretion/openerp-server,akretion/openerp-server