Medium: Pure-FTPd: Create pid directory if needed

> Medium: Pure-FTPd: Create PID directory if needed
This patch is required for Ubuntu where /var/run has been replaced with tmpfs. Thus Pure-FTPd's default PID directory /var/run/pure-ftpd/ does not exist after a reboot.

Normally, the init-script would take care of that but we're not using the init-script for this resource agent.

> Dev: Pure-FTPd: fix spacing
spacing fix only - no changes