Documentation: Add missing git svn commands

Signed-off-by: Gustaf Hendeby <hendeby@isy.liu.se>
Acked-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-svn.txt

@@ -196,10 +196,10 @@ Any other arguments are passed directly to `git log'
 	independently of git-svn functions.
 
 'create-ignore'::
-
 	Recursively finds the svn:ignore property on directories and
 	creates matching .gitignore files. The resulting files are staged to
-	be committed, but are not committed.
+	be committed, but are not committed. Use -r/--revision to refer to a
+	specfic revision.
 
 'show-ignore'::
 	Recursively finds and lists the svn:ignore property on
@@ -223,6 +223,19 @@ Any other arguments are passed directly to `git log'
 	argument.  Use the --url option to output only the value of the
 	'URL:' field.
 
+'proplist'::
+	Lists the properties stored in the Subversion repository about a
+	given file or directory.  Use -r/--revision to refer to a specific
+	Subversion revision.
+
+'propget'::
+	Gets the Subversion property given as the first argument, for a
+	file.  A specific revision can be specified with -r/--revision.
+
+'show-externals'::
+	Shows the Subversion externals.  Use -r/--revision to specify a
+	specific revision.
+
 --
 
 OPTIONS