Watchdog uses instance certificate to bang
Update test for watchdog to check certificates
create and run $MD5/buildout.cfg
does not crash when there are no certificates (should fix #20130121-136C24)
slapformat creates partition_pki if needed
minor style
extracted monkeypatching, provided version number
split mammoth run() function
grammar, typos
extracted write_computer_definition()
minor style, indentation
support writing to computer_json
updated docstring
Don't check validity of ipv4 when trying to add address that already exists.

Code checking validity only works for ipv6. So we only return True.
only attemp to backup existing xml files
removed duplicate line
added attribute defaults
Output warning when assigning new IP
Add XXX in entry.py
Merge remote-tracking branch 'origin/slapformat'