moduleapi: Add module:send() as an alias for core_post_stanza() from the current host's origin

core/moduleapi.lua

@@ -22,6 +22,7 @@ local tonumber, tostring = tonumber, tostring;
 
 local prosody = prosody;
 local hosts = prosody.hosts;
+local core_post_stanza = prosody.core_post_stanza;
 
 -- Registry of shared module data
 local shared_data = setmetatable({}, { __mode = "v" });
@@ -306,4 +307,8 @@ function api:provides(name, item)
 	self:add_item(name, item);
 end
 
+function api:send(stanza)
+	return core_post_stanza(hosts[self.host], stanza);
+end
+
 return api;