#2 Add "libarchive/bsdtar" and "The Unarchiver/unar" support for (rar and others) files support

[coadde]

Add "libarchive/bsdtar" and "The Unarchiver/unar" support for (rar and others) files support

bsdtar and unar support rar v3[0][1]

[0]http://libarchive.org
[1]http://unarchiver.c3.cx/formats

[Wolfgang Friebel]

Hi,

I have added bsdtar in the 1.83 version. I did not include unar as by default extraction is always on disk if I see it correctly and there is no specific option to use stdout. The -o option and specifying /dev/stdout does not work on all platforms. In addition to list the contents one needs yet another program, lsar. As there are already two programs to handle rar I believe this solution is acceptable