PHP7移除的扩展和SAPI
删除了：
-cow/aolserver
-cow/apache-cow/apache_hooks
-cow/apache2filter
-cow/caudium
-cow/连续性
-cow/isapi
-cow/milter
-cow/ nsapi
- 牛/phttpd
- 牛/pi3web
- 牛/roxen
- 牛/thttpd
- 牛/tux
- 牛/webjames
- ext/mssql
- ext/mysql
- ext/sybase_ct
- ext/ ereg
参考资料：
https://wiki.php.net/rfc/removal_of_dead_sapis_and_exts
https://wiki.php.net/rfc/remove_deprecated_functionity_in_php7
