kes Add PATH command to SunOS part of mtx-changer.in so that sed and

kes  Add PATH command to SunOS part of mtx-changer.in so that sed and
     awk are on the path.
kes  Redirect stderror to stdin on mt status command in mtx-changer.in
     since the status is returned on stderr on Solaris.
kes  Activate Close button on tray-monitor window. This fixes
     bug #986.
kes  Check for NULL item in parse_conf.c before calling it.  In the
     case of Device, there is no item and this caused a seg fault when
     Device appears in the conf file.
kes  Add a #define __CONFIG_H when including config.h in bacula.h. This
     avoids pulling in config.h multiple times in some new code.