daemonize

An implementation of linux 'daemonize` command. Daemonizer runs the program as a linux daemon.
During the daemonizing process:

- All open file descriptors are closed
- Program's working directory is changed to root in order to prevent filesystems from being unmounted
- File creation mask is cleared
- Parent process is killed and the daemon is branched directly to 'init'
- File descriptors 0, 1, and 2 are attached to root
- Process logs are directed to "syslog deamon"