fix PHP 7.4+ GD configure failure on CentOS 6 in 140.00beta01 On CentOS 6, centmin.sh menu 5 PHP 7.4+ builds stopped at configure with "Package requirements (gdlib >= 2.1.0) were not met" because system gd-devel is 2.0.34. PHP_LIBGD_EXTERNAL='y' adds...