According to http://en.wikipedia.org/wiki/LHA_%28file_format%29 the registered mime type of .lha and .lhz files is application/x-lzh-compressed. So it should be an alias of application/x-lha.
Created attachment 52212 [details] [review] Add application/x-lzh-compressed as alias to application/x-lha
commit 7179b0c5414a73d9ebc6b551a1f25f9a57a28fea Author: Vincent Untz <vuntz@gnome.org> Date: Tue Oct 11 15:02:05 2011 +0200 Add application/x-lzh-compressed as alias to application/x-lha https://bugs.freedesktop.org/show_bug.cgi?id=41680
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