Ticket #2739: add support of comic books.

Signed-off-by: Slava Zanko <slavazanko@gmail.com>

misc/ext.d/doc.sh.in

@@ -155,6 +155,9 @@ do_open_action() {
     djvu)
         djview "${MC_EXT_FILENAME}" &
         ;;
+    comic)
+        cbrpager "${MC_EXT_FILENAME}" &
+        ;;
     *)
         ;;
     esac

misc/mc.ext.in

@@ -600,6 +600,10 @@ regex/i/\.djvu?$
 	Open=@EXTHELPERSDIR@/doc.sh open djvu
 	View=%view{ascii} @EXTHELPERSDIR@/doc.sh view djvu
 
+# Comic Books
+regex/i/\.cb[zr]$
+	Open=@EXTHELPERSDIR@/doc.sh open comic
+
 ### Miscellaneous ###
 
 # Compiled Java classes