vifm: fileviewer command for DMG files

etc/soft/vifm/filetypes

@@ -71,6 +71,9 @@ fileviewer *.zip,*.jar,*.war,*.ear zip -sf %c
 fileviewer *.7z	7z l %c
 fileviewer *.rar unrar l %c
 
+" DMG
+fileviewer *.dmg 7z l %c | awk '/Scanning.*/ { f=1; next } f'
+
 " ISO
 fileviewer *.iso isoinfo -l -i %c