Adds missing 'ModSecurity:' prefix to log messages

As reported by Walter Hop, the status call functionality was printing a message
in the console without the expected 'ModSecurity:' prefix. SecServerSignature
was also printing messages without the expected prefix. Both are fixed by this
commit.

Author: Felipe Zimmerle

apache2/mod_security2.c

@@ -748,7 +748,8 @@ static int hook_post_config(apr_pool_t *mp, apr_pool_t *mp_log, apr_pool_t *mp_t
         /* If we've changed the server signature make note of the original. */
         if (new_server_signature != NULL) {
             ap_log_error(APLOG_MARK, APLOG_NOTICE | APLOG_NOERRNO, 0, s,
-                    "Original server signature: %s", real_server_signature);
+                    "ModSecurity: Original server signature: %s",
+                    real_server_signature);
         }
 
 #ifndef WIN32
@@ -757,8 +758,8 @@ static int hook_post_config(apr_pool_t *mp, apr_pool_t *mp_log, apr_pool_t *mp_t
         }
         else {
             ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, NULL,
-                    "Status engine is currently disabled, enable it by set " \
-                    "SecStatusEngine to On.");
+                    "ModSecurity: Status engine is currently disabled, enable " \
+                    "it by set SecStatusEngine to On.");
         }
 #endif