syncdraw lost @-codes on file load

Syncdraw won't load the @-CODES from .msg file

steps to reproduce:

• open syncdraw
• put some @code like @SEC@
• save as "sync" with "test.msg" as filname
• close syncdraw

• load the file again:
• ./syncdraw test.msg

the @SEC@ code do not show

expected result: the file must have @SEC@ code

This is because .msg is not a known file type. For .asc, .ans, and .avt files, this won't happen.

For unknown file types, it parses all supported codes, ANSI, Avatar, Synchronet, and PCBoard. It's the PCBoard that's eating the @xxx@ codes.

closed

.msg has been a Synchronet display file type for longer than any other. Perhaps just add it as a known type to SyncDraw?

Several menu files was migrated from asc to msg at text directory I think that editing .msg files with syncdraw can be useful.

I just committed a change to load .msg files and treat them the same as .asc.