update comment

HTTP.cpp

@@ -72,7 +72,7 @@ namespace http {
     std::size_t pos_p = 0; /* < current parse position */
     std::size_t pos_c = 0; /* < work position */
     if (url.at(0) == '/' && url.find("/http://") == 0) {
-      /* specical case */
+      /* special case for i2p.rocks inproxy */
       pos_p ++;
     }
     if(url.at(0) != '/' || pos_p > 0) {