This mod add the BBCode noparse tag (and the short version : np).
This tag makes it possible to avoid the parsing BBCode for part of a message.
Example : [noparse][ b][ i]message[/i][/b][/noparse]
Will show this (without parsing) : [ b][ i]message[/i][/b]
--> I had to add a space after "[" for this example.
Method used
For all the contents located in the noparse tag (and np tag),
we replace the "[" and "]" character by character strings specific. This is
allow to pass in full discretion the zone of parsing BBCode and then, before
sending the text, we rebuild the original message by making the opposite replacement.