ENH: MAke it work on FreeBSD

Modules/FindThreads.cmake

@@ -81,11 +81,6 @@ IF(CMAKE_USE_PTHREADS_INIT)
     SET(CMAKE_THREAD_LIBS_INIT )
   ENDIF(CMAKE_SYSTEM MATCHES "OSF1-V*")
 
-  IF(CMAKE_SYSTEM MATCHES "FreeBSD*")
-    SET(CMAKE_USE_PTHREADS_INIT 0)
-    SET(CMAKE_THREAD_LIBS_INIT )
-  ENDIF(CMAKE_SYSTEM MATCHES "FreeBSD*")
-
   IF(CMAKE_SYSTEM MATCHES "CYGWIN_NT*")
     SET(CMAKE_USE_PTHREADS_INIT 1)
     SET(CMAKE_THREAD_LIBS_INIT )