git-am: propagate -C<n>, -p<n> options as well

These options are meant to deal with patches that do not apply cleanly
due to the differences between the version the patch was based on and
the version "git am" is working on.

Because a series of patches applied in the same "git am" run tends to
come from the same source, it is more useful to propagate these options
after the application stops.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

git-am.sh

@@ -121,7 +121,7 @@ It does not apply to blobs recorded in its index."
 
 prec=4
 dotest="$GIT_DIR/rebase-apply"
-sign= utf8=t keep= skip= interactive= resolved= rebasing= abort= ws=
+sign= utf8=t keep= skip= interactive= resolved= rebasing= abort=
 resolvemsg= resume=
 git_apply_opt=
 
@@ -156,7 +156,7 @@ do
 	--resolvemsg)
 		shift; resolvemsg=$1 ;;
 	--whitespace)
-		ws="--whitespace=$2"; shift ;;
+		git_apply_opt="$git_apply_opt $1=$2"; shift ;;
 	-C|-p)
 		git_apply_opt="$git_apply_opt $1$2"; shift ;;
 	--)
@@ -247,10 +247,10 @@ else
 		exit 1
 	}
 
-	# -s, -u, -k and --whitespace flags are kept for the
-	# resuming session after a patch failure.
+	# -s, -u, -k, --whitespace, -C and -p flags are kept
+	# for the resuming session after a patch failure.
 	# -3 and -i can and must be given when resuming.
-	echo " $ws" >"$dotest/whitespace"
+	echo " $git_apply_opt" >"$dotest/apply_opt_extra"
 	echo "$sign" >"$dotest/sign"
 	echo "$utf8" >"$dotest/utf8"
 	echo "$keep" >"$dotest/keep"
@@ -283,7 +283,7 @@ if test "$(cat "$dotest/keep")" = t
 then
 	keep=-k
 fi
-ws=$(cat "$dotest/whitespace")
+git_apply_opt=$(cat "$dotest/apply_opt_extra")
 if test "$(cat "$dotest/sign")" = t
 then
 	SIGNOFF=`git var GIT_COMMITTER_IDENT | sed -e '
@@ -454,7 +454,7 @@ do
 
 	case "$resolved" in
 	'')
-		git apply $git_apply_opt $ws --index "$dotest/patch"
+		git apply $git_apply_opt --index "$dotest/patch"
 		apply_status=$?
 		;;
 	t)