mc: treat .xbps as .tar.xz.

srcpkgs/mc/patches/xbps.patch

@@ -0,0 +1,13 @@
+--- misc/mc.ext.in	2017-08-21 19:28:49.638411103 +0200
++++ misc/mc.ext.in	2017-08-21 19:38:05.633602005 +0200
+@@ -145,8 +145,8 @@
+ 	Open=%cd %p/utar://
+ 	View=%view{ascii} @EXTHELPERSDIR@/archive.sh view tar.lz4
+ 
+-# .tar.xz, .txz
+-regex/\.t(ar\.xz|xz)$
++# .tar.xz, .txz, .xbps
++regex/\.(t(ar\.xz|xz)|xbps)$
+ 	Open=%cd %p/utar://
+ 	View=%view{ascii} @EXTHELPERSDIR@/archive.sh view tar.xz
+ 

srcpkgs/mc/template

@@ -1,7 +1,7 @@
 # Template file for 'mc'
 pkgname=mc
 version=4.8.19
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="--with-screen=ncurses --without-x"
 hostmakedepends="pkg-config perl"