am: support --include option

am supports a number of pass-through options
to apply, like --exclude and --directory. Add
--include to this list.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-am.txt

@@ -13,7 +13,7 @@ SYNOPSIS
 	 [--3way] [--interactive] [--committer-date-is-author-date]
 	 [--ignore-date] [--ignore-space-change | --ignore-whitespace]
 	 [--whitespace=<option>] [-C<n>] [-p<n>] [--directory=<dir>]
-	 [--exclude=<path>] [--reject] [-q | --quiet]
+	 [--exclude=<path>] [--include=<path>] [--reject] [-q | --quiet]
 	 [--scissors | --no-scissors]
 	 [(<mbox> | <Maildir>)...]
 'git am' (--continue | --skip | --abort)
@@ -89,6 +89,7 @@ default.   You can use `--no-utf8` to override this.
 -p<n>::
 --directory=<dir>::
 --exclude=<path>::
+--include=<path>::
 --reject::
 	These flags are passed to the 'git apply' (see linkgit:git-apply[1])
 	program that applies

git-am.sh

@@ -23,6 +23,7 @@ ignore-space-change pass it through git-apply
 ignore-whitespace pass it through git-apply
 directory=      pass it through git-apply
 exclude=        pass it through git-apply
+include=        pass it through git-apply
 C=              pass it through git-apply
 p=              pass it through git-apply
 patch-format=   format the patch(es) are in
@@ -363,7 +364,7 @@ do
 		;;
 	--resolvemsg)
 		shift; resolvemsg=$1 ;;
-	--whitespace|--directory|--exclude)
+	--whitespace|--directory|--exclude|--include)
 		git_apply_opt="$git_apply_opt $(sq "$1=$2")"; shift ;;
 	-C|-p)
 		git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;