ext/uri, ext/standard – URL parsing: improve error reporting using detailed url_error codes

[arshidkv12]

Replace generic URL parse failure warning with specific error messages
based on php_url_parse_ex2() error codes (invalid port, trailing colon,
port too long, empty host, etc.).

+		 switch (url_error) {
+            case PHP_URL_ERR_INVALID_PORT:
+                php_error_docref(NULL, E_WARNING, "Invalid port in URL");
+                break;
+            case PHP_URL_ERR_TRAILING_COLON:
+                php_error_docref(NULL, E_WARNING, "Trailing colon without port in URL");
+                break;
+            case PHP_URL_ERR_PORT_TOO_LONG:
+                php_error_docref(NULL, E_WARNING, "Port number too long in URL");
+                break;
+            case PHP_URL_ERR_EMPTY_HOST:
+                php_error_docref(NULL, E_WARNING, "Empty host in URL");
+                break;
+            default:
+                php_error_docref(NULL, E_WARNING, "Unable to parse URL");
+                break;
+        }