Properly initialize logging

We need to call APLOG_USE_MODULE() so that the module name is reported
properly in log lines, and per module logging level can be set.

Fixes #6

Author: simo5

src/mod_auth_gssapi.c

@@ -28,6 +28,8 @@
 
 module AP_MODULE_DECLARE_DATA auth_gssapi_module;
 
+APLOG_USE_MODULE(auth_gssapi);
+
 APR_DECLARE_OPTIONAL_FN(int, ssl_is_https, (conn_rec *));
 
 static char *mag_status(request_rec *req, int type, uint32_t err)

src/sessions.c

@@ -2,6 +2,8 @@
 
 #include "mod_auth_gssapi.h"
 
+APLOG_USE_MODULE(auth_gssapi);
+
 static APR_OPTIONAL_FN_TYPE(ap_session_load) *mag_sess_load_fn = NULL;
 static APR_OPTIONAL_FN_TYPE(ap_session_get) *mag_sess_get_fn = NULL;
 static APR_OPTIONAL_FN_TYPE(ap_session_set) *mag_sess_set_fn = NULL;