tree-wide: make ++/-- usage consistent WRT spacing

Throughout the tree there's spurious use of spaces separating ++ and --
operators from their respective operands.  Make ++ and -- operator
consistent with the majority of existing uses; discard the spaces.

src/socket-proxy/socket-proxyd.c

@@ -427,7 +427,7 @@ static int resolve_remote(Connection *c) {
         service = strrchr(arg_remote_host, ':');
         if (service) {
                 node = strndupa(arg_remote_host, service - arg_remote_host);
-                service ++;
+                service++;
         } else {
                 node = arg_remote_host;
                 service = "80";