Merge branch 'dl/submodule-set-url'

"git submodule" learned a subcommand "set-url".

* dl/submodule-set-url:
  submodule: teach set-url subcommand

contrib/completion/git-completion.bash

@@ -2783,7 +2783,7 @@ _git_submodule ()
 {
 	__git_has_doubledash && return
 
-	local subcommands="add status init deinit update set-branch summary foreach sync absorbgitdirs"
+	local subcommands="add status init deinit update set-branch set-url summary foreach sync absorbgitdirs"
 	local subcommand="$(__git_find_on_cmdline "$subcommands")"
 	if [ -z "$subcommand" ]; then
 		case "$cur" in