merge patches to mariadb-5.5-cygwin.patch

      * no epoll in the cygwin, so we remove thread-pool functions
      * Error: CFI instruction used without previous .cfi_startproc
      * cmake could't configure ncurses

It's an example to show how to use cygport to install component

It's an example to show how to disable a package in the cygwin

It's an example to show how to use system cmake

By don't creating the inituser file if it has already been done once.