git-gui: Save remote urls obtained from config/remotes setup

I'm storing the URLs of any pre-configured remote repositories
that we happen to come across so that we can later use these
URLs to show to the user in parts of the UI that might care.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

lib/remote.tcl

@@ -57,6 +57,7 @@ proc all_tracking_branches {} {
 proc load_all_remotes {} {
 	global repo_config
 	global all_remotes tracking_branches some_heads_tracking
+	global remote_url
 
 	set some_heads_tracking 0
 	set all_remotes [list]
@@ -76,6 +77,10 @@ proc load_all_remotes {} {
 			catch {
 				set fd [open [file join $rm_dir $name] r]
 				while {[gets $fd line] >= 0} {
+					if {[regexp {^URL:[ 	]*(.+)$} $line line url]} {
+						set remote_url($name) $url
+						continue
+					}
 					if {![regexp {^Pull:[ 	]*([^:]+):(.+)$} \
 						$line line src dst]} continue
 					if {[string index $src 0] eq {+}} {
@@ -100,6 +105,7 @@ proc load_all_remotes {} {
 	foreach line [array names repo_config remote.*.url] {
 		if {![regexp ^remote\.(.*)\.url\$ $line line name]} continue
 		lappend all_remotes $name
+		set remote_url($name) $repo_config(remote.$name.url)
 
 		if {[catch {set fl $repo_config(remote.$name.fetch)}]} {
 			set fl {}