There is bitcoind, the headless client, which can be used as a server. Or you mean "make something like 'if bitcoind crashes, restart it automatically?'"?
He asks for a option for a bitcoind to not fork upon execution and not try to daemonize itself. Believe that or not, daemonizing feature is external to almost any application on UNIX.
Applications that always daemonize require ugly hacks, like that described here http://cr.yp.to/daemontools/fghack.html to run them in more manageable way, than just manually from a command line.
Use case: restart bitcoind instantly as soon as it or the whole system crashes (and reboots).
