Created attachment 52251 [details] [review] Add application/winhlp .hlp files are usually winhelp files. Here's a patch for this; I'm unsure if there's magic for those files.
the magic for help files should be: 0x3F 0x5F 0x03 0x00
Reference: http://www.winhex.com/winhex/kb/ff/HLP.txt (identifies the same)
Created attachment 52253 [details] [review] Updated patch, with magic
commit 5cb1444444f1708959a34b5c23ff4ef317cbadd6 Author: Vincent Untz <vuntz@gnome.org> Date: Tue Oct 11 17:09:46 2011 +0200 Add application/winhlp https://bugs.freedesktop.org/show_bug.cgi?id=41708
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