fix pidfile option to work in WIN32

fix pidfile option to work in WIN32

Explicit read/write locking pidfile under WIN32 is bit extreme
nobody get the chance to read the pidfile. Convert to a write-only lock.

Also, creating pidfile was disabled along with daemonize under
WIN32. Enable it, but do not enable daemon support which doesn't
exist under WIN32 atm.

From: Juha Riihimäki <[email protected]>
Signed-off-by: Juha Riihimäki <[email protected]>
Signed-off-by: Riku Voipio <[email protected]>
Signed-off-by: Aurelien Jarno <[email protected]>