again some chars where missing

Changelog

@@ -1,3 +1,6 @@
+2026-02-06:
+- fixed: character '=' was ignored in the request
+
 2026-01-06: Version: 0.3
 - Added a simple WebServer functionality.
 

webutils.cc

@@ -181,7 +181,7 @@ std::string WebRequestBuffer::GetRequest() {
         c = request[i];
         if (((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || 
              (c >= 'A' && c <= 'Z') || c == '/' || c == '.' || c == '-' || 
-             c == '?' || c == '%') &&
+             c == '?' || c == '%' || c == '=' || c == '_') &&
             (!((c == '.' || c == '/' ) && (lastc == '/' || lastc == '.')))) {
                 rq += c;
                 lastc = c;