Drop -m from --in etc completion getters.

http://lists.alioth.debian.org/pipermail/bash-completion-devel/2010-January/002453.html

contrib/ipv6calc

@@ -14,7 +14,8 @@ _ipv6calc()
             return 0
             ;;
         -I|--in|-O|--out|-A|--action)
-            COMPREPLY=( $( compgen -W "$( ipv6calc -m "$prev" -h 2>&1 | \
+            # With ipv6calc < 0.73.0, -m does nothing here, so use sed instead.
+            COMPREPLY=( $( compgen -W "$( ipv6calc "$prev" -h 2>&1 | \
                 sed -ne 's/^[[:space:]]\{1,\}\([^[:space:]:]\{1,\}\)[[:space:]]*:.*/\1/p' )" \
                 -- "$cur" ) )
             return 0