re2c version(s)

Hi, I think, many core developers saw unexpected changes in "zend_labguages_scanner.c" or "var_unserializer.c" after rebuilds. This occurs, because we use different versions of re2c, and some of them produce really different code. They also embed version number into the generate source. Currently different files in PHP source tree generated by different re2c versions: ext/json/json_scanner.c 0.16 ext/date/lib/parse_date.c 0.15.3 ext/date/lib/parse_iso_intervals.c 0.15.3 ext/pdo/pdo_sql_parser.c 0.16 ext/phar/phar_path_check.c 1.0.3 sapi/phpdbg/phpdbg_lexer.c 0.16 ext/standard/url_scanner_ex.c 0.16 ext/standard/var_unserializer.c 1.0.1 Zend/zend_ini_scanner.c 0.15 Zend/zend_language_scanner.c 1.0.1 I propose, to change build scripts (in master and PHP-7.3) to require at least re2c version 1.0.0 (it seems 1.0.0-1.0.3 produce the same result) and suppress version output into the generated files. I'm not sure about timelib files. Thanks. Dmitry.