[Trac] AddComment macro (reloaded ;-))

[Emmanuel-G BLOT]

The AddMacro stopped to work one more time. I believe a recent update in Trac engine 
[http://projects.edgewall.com/trac/changeset/1701 1701] enforces security checks with the POST 
HTTP method.

As the POST method actions are now carefully checked, the workaround is to use the GET HTTP 
method, but it seems more than a hack to me. As this macro is I believe, quite useful, I was 
wondering whether it could be merged in the official supported macro store [in wiki/macros.py], 
along with the Image() macro...

BR,
Manu