config.txt: move tag.* 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

@@ -419,22 +419,7 @@ include::config/stash.txt[]
 
 include::config/submodule.txt[]
 
-tag.forceSignAnnotated::
+include::config/tag.txt[]
-	A boolean to specify whether annotated tags created should be GPG signed.
-	If `--annotate` is specified on the command line, it takes
-	precedence over this option.
-
-tag.sort::
-	This variable controls the sort ordering of tags when displayed by
-	linkgit:git-tag[1]. Without the "--sort=<value>" option provided, the
-	value of this variable will be used as the default.
-
-tar.umask::
-	This variable can be used to restrict the permission bits of
-	tar archive entries.  The default is 0002, which turns off the
-	world write bit.  The special value "user" indicates that the
-	archiving user's umask will be used instead.  See umask(2) and
-	linkgit:git-archive[1].
 
 transfer.fsckObjects::
 	When `fetch.fsckObjects` or `receive.fsckObjects` are

Documentation/config/tag.txt

@@ -0,0 +1,16 @@
+tag.forceSignAnnotated::
+	A boolean to specify whether annotated tags created should be GPG signed.
+	If `--annotate` is specified on the command line, it takes
+	precedence over this option.
+
+tag.sort::
+	This variable controls the sort ordering of tags when displayed by
+	linkgit:git-tag[1]. Without the "--sort=<value>" option provided, the
+	value of this variable will be used as the default.
+
+tar.umask::
+	This variable can be used to restrict the permission bits of
+	tar archive entries.  The default is 0002, which turns off the
+	world write bit.  The special value "user" indicates that the
+	archiving user's umask will be used instead.  See umask(2) and
+	linkgit:git-archive[1].