Replace TRUE/FALSE with true/false in zbeacon.c to fix *NIX builds

* Now that stdbool is setup properly, true/false are valid
* TRUE/FALSE definitions were removed by 5b341b4940
Fix Solaris builds - they need sys/sockio.h for SIOCGIFADDR defs
Merge pull request #127 from vortechs2000/fix_unix

Fix *nix builds