This variable allows you to specify mangling (post processing) of data received from the irc server before it is processed by the client. Usually this mangling strips garbage characters, or other special formatting you don't want to see (such as colors)
You may specify any number of mangling rule levels by separating them with commas, and you can unspecify a mangling rule by prefixing it with a hyphen.
For a list of all mangle types, see the mangle_types page.
The set mangle_inbound variable first appeared in epic4pre1.401.