using syslog instead of console for messages

[Riccardo Magliocchetti]

Hello Stephan, all,

while in headless mode i'd like to have messages delivered to syslog
instead of stderr / stdout, looking at the SAL_* implementation it looks
like what i want is to substitute the std::fputs in
osl/all/log.cxx::log() with syslog() plus some map between these levels
and syslog ones. Is that ok?

Also does "libo" makes sense as message prefix?

thanks,
riccardo