lib/kadm5: _kadm5_s_init_hooks

prevent leak of configuration strings introduced by
f62b00e33c ("kadm5: improve
kadm5 hook logging (#397)")

Change-Id: I12c028241e6ee0175599b6edc6a334c6efb858d9

lib/kadm5/server_hooks.c

@@ -160,6 +160,7 @@ _kadm5_s_init_hooks(kadm5_server_context *ctx)
 	krb5_warnx(context, "Loaded kadm5 hook `%s' by vendor `%s' (API version %u)",
 		   hook->name, hook->vendor, hook->version);
     }
+    krb5_config_free_strings(hooks);
     return 0;
 #else
     krb5_warnx(context, "kadm5 hooks configured, but platform "