mod_http_oauth2: Accept empty scope Some tool I used couldn't not send a scope, preventing it from working with mod_http_oauth2. This change should fix that.

+
−This module lets you block connections to remote servers at the s2s
+
−level.
+
−
+
−``` {.lua}
+
−s2s_blacklist = {
+
−    "proxy.eu.jabber.org",
+
−}
+
−```