Added documentation to outmessage-irccolors

contrib/outmessage-irccolors.tengo

@@ -1,5 +1,16 @@
-// See https://github.com/42wim/matterbridge/issues/798
+/*
+variables available 
+read-only:
+inAccount, inProtocol, inChannel, inGateway
+outAccount, outProtocol, outChannel, outGateway
 
+read-write:
+msgText, msgUsername
+*/
+
+text := import("text")
+
+// See https://github.com/42wim/matterbridge/issues/798
 // if we're not sending to an irc bridge we strip the IRC colors
 if outProtocol != "irc" {
     re := text.re_compile(`\x03(?:\d{1,2}(?:,\d{1,2})?)?|[[:cntrl:]]`)