Server: Eliminate dependency on libdaemon.

The library is nice but we don't really need all the functionality
provided by it. The downside is we loose some functionality like
pid file creation, unix daemonization, logging to syslog. The good part
is we need one less external library and on x86_64 RSS goes down by
100kb, VIRT by 2MB.

Signed-off-by: Peter Tworek <tworaz666@gmail.com>