hg serve: add clearer message when starting the server with --verbose

Explicitly tell the address is the one the process is bound to.
Fix the printing of IPv6 addresses.

mercurial/commands.py

@@ -2527,8 +2527,17 b' def serve(ui, repo, **opts):'
             if port == ':80':
                 port = ''
 
-            ui.status(_('listening at http://%s%s/%s (%s:%d)\n') %
-                      (self.httpd.fqaddr, port, prefix, self.httpd.addr, self.httpd.port))
+            bindaddr = self.httpd.addr
+            if bindaddr == '0.0.0.0':
+                bindaddr = '*'
+            elif ':' in bindaddr: # IPv6
+                bindaddr = '[%s]' % bindaddr
+
+            fqaddr = self.httpd.fqaddr
+            if ':' in fqaddr:
+                fqaddr = '[%s]' % fqaddr
+            ui.status(_('listening at http://%s%s/%s (bound to %s:%d)\n') %
+                      (fqaddr, port, prefix, bindaddr, self.httpd.port))
 
         def run(self):
             self.httpd.serve_forever()

tests/test-serve.out

@@ -1,12 +1,12 b''
 % Without -v
 access log created - .hg/hgrc respected
 % With -v
-listening at http://localhost/ (127.0.0.1)
+listening at http://localhost/ (bound to 127.0.0.1)
 % With --prefix foo
-listening at http://localhost/foo/ (127.0.0.1)
+listening at http://localhost/foo/ (bound to 127.0.0.1)
 % With --prefix /foo
-listening at http://localhost/foo/ (127.0.0.1)
+listening at http://localhost/foo/ (bound to 127.0.0.1)
 % With --prefix foo/
-listening at http://localhost/foo/ (127.0.0.1)
+listening at http://localhost/foo/ (bound to 127.0.0.1)
 % With --prefix /foo/
-listening at http://localhost/foo/ (127.0.0.1)
+listening at http://localhost/foo/ (bound to 127.0.0.1)