KWSys: Enable process tree killing on kFreeBSD

Teach kwsysProcessKill to identify processes on this platform using the "ps"
command just as on Linux.  Patch from Modestas Vainius <modax@debian.org>.
See issue #10432.

ProcessUNIX.c

@@ -2373,7 +2373,8 @@ static pid_t kwsysProcessFork(kwsysProcess* cp,
    Here we define the command to call on each platform and the
    corresponding parsing format string.  The parsing format should
    have two integers to store: the pid and then the ppid.  */
-#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) \
+   || defined(__FreeBSD_kernel__)
 # define KWSYSPE_PS_COMMAND "ps axo pid,ppid"
 # define KWSYSPE_PS_FORMAT  "%d %d\n"
 #elif defined(__hpux) || defined(__sun__) || defined(__sgi) || defined(_AIX) \

kwsysDateStamp.cmake

@@ -15,7 +15,7 @@
 SET(KWSYS_DATE_STAMP_YEAR  2010)
 
 # KWSys version date month component.  Format is MM.
-SET(KWSYS_DATE_STAMP_MONTH 02)
+SET(KWSYS_DATE_STAMP_MONTH 03)
 
 # KWSys version date day component.  Format is DD.
-SET(KWSYS_DATE_STAMP_DAY   12)
+SET(KWSYS_DATE_STAMP_DAY   18)