config.txt: move apply.* to a separate file

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -297,17 +297,7 @@ include::config/alias.txt[]
 
 include::config/am.txt[]
 
-apply.ignoreWhitespace::
-	When set to 'change', tells 'git apply' to ignore changes in
-	whitespace, in the same way as the `--ignore-space-change`
-	option.
-	When set to one of: no, none, never, false tells 'git apply' to
-	respect all whitespace differences.
-	See linkgit:git-apply[1].
-
-apply.whitespace::
-	Tells 'git apply' how to handle whitespaces, in the same way
-	as the `--whitespace` option. See linkgit:git-apply[1].
+include::config/apply.txt[]
 
 blame.blankBoundary::
 	Show blank commit object name for boundary commits in

Documentation/config/apply.txt

@@ -0,0 +1,11 @@
+apply.ignoreWhitespace::
+	When set to 'change', tells 'git apply' to ignore changes in
+	whitespace, in the same way as the `--ignore-space-change`
+	option.
+	When set to one of: no, none, never, false tells 'git apply' to
+	respect all whitespace differences.
+	See linkgit:git-apply[1].
+
+apply.whitespace::
+	Tells 'git apply' how to handle whitespaces, in the same way
+	as the `--whitespace` option. See linkgit:git-apply[1].