Merge branch 'gb/am-foreign'

* gb/am-foreign:
  git-am: refactor 'cleaning up and aborting'
  git-am foreign patch support: StGIT support
  git-am foreign patch support: autodetect some patch formats
  git-am foreign patch support: introduce patch_format

diff --cc git-am.sh
index 58d4eb6d2dc2eaa99ae0c70a414813cd0ce43e43,327807ddcb5fbe3d08c459887c472ed564210570..d64d9975358a6b9a18596c45b13434463903a344
--- 1/git-am.sh
--- 2/git-am.sh
+++ b/git-am.sh
@@@ -281,12 -397,12 +404,12 @@@ els
                done
                shift
        fi
-       git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
-               rm -fr "$dotest"
-               exit 1
-       }
+ 
+       check_patch_format "$@"
+ 
+       split_patches "$@"
  
 -      # -s, -u, -k, --whitespace, -3, -C and -p flags are kept
 +      # -s, -u, -k, --whitespace, -3, -C, -q and -p flags are kept
        # for the resuming session after a patch failure.
        # -i can and must be given when resuming.
        echo " $git_apply_opt" >"$dotest/apply-opt"