package/rpcbind: add an upstream URL to Config.in

Add an upstream URL to the help text in Config.in. This
addresses the 'Missing' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/rpcbind/Config.in

@@ -9,6 +9,8 @@ config BR2_PACKAGE_RPCBIND
 	  The rpcbind utility is a server that converts RPC program
 	  numbers into universal addresses.
 
+	  https://sourceforge.net/projects/rpcbind/
+
 comment "rpcbind needs a toolchain w/ threads"
 	depends on !BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_USE_MMU