Implementing pidfile to identify the main process of slony instance:

slon_tools.conf-sample - add configuration variables
  . $PIDFILE_DIR : directory where the pid files will be created (default: /var/run/slony1)
  . $PIDFILE_PREFIX : prefix to pidfiles of node instances (default: cluster name)

slon-tools.pm:
 . start_slon : changed to init slon daemon with -p pidfile and added a sleep time
    to give time to slon daemon initialize and create the pid file

 . get_pid: changed to read the pid file to get the pid number

slon_kill.pl:
  . change kill method of slon daemon to get_pid then use kill 15 instead 9 to
    slon daemon remove the pid file properly

slon_watchdog2.pl:
  . Add sleep time before first query status to avoid the watchdog kill slon_daemon
    just immediatelly they started
  . Do not try to kill slon proccess with 9.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=e1c8a5fc8d0ecec48bd87617b37cfa77e2899159

Modified Files
--------------
tools/altperl/slon-tools.pm          |   46 ++++++++++++++++++++-------------
tools/altperl/slon_kill.pl           |   46 ++++++++++++++--------------------
tools/altperl/slon_tools.conf-sample |   10 +++++++
tools/altperl/slon_watchdog2.pl      |    8 +++++-
4 files changed, 64 insertions(+), 46 deletions(-)