Replace deprecated wfMsgHtml/wfMsg by wfMessage

This also fixes an already invalid usage of makeKnownLinkObj where
non-escaped text would have been plainly forwarded (thanks to
Florianschmidtwelzow) and simplify call be avoiding a double escape
(thanks to Siebrand).

Bug: 68750
Change-Id: If36db889093f74c9fc37ddf9ea5d258d57e32f92
Signed-off-by: Tiziano Müller <tm@dev-zero.ch>
Merge "Replace deprecated wfMsgHtml/wfMsg by wfMessage"