updated information about os_freebsd.cpp

git-svn-id: https://smartmontools.svn.sourceforge.net/svnroot/smartmontools/trunk@2902 4ea69e1a-61f1-4043-bf83-b5c94c648137

www/doxygen/doc_main.txt

@@ -57,10 +57,10 @@
   Already adapted to <b>new c++ Interface</b>
   - os_linux.cpp
   - os_win32.cpp
+  - os_freebsd.cpp<br>
 
   Still working with old interface
   - os_darwin.cpp<br> 
-  - os_freebsd.cpp<br>
   - os_netbsd.cpp<br>
   - os_openbsd.cpp<br>
   - os_os2.cpp<br>