callback to provide a RegexpField class.
* Added checkbox for submitter contact information being the same as
IETF contact information; with javascript support and validation
support.
* Cleaned out the old split_form() and mk_formatting_form() functions from
ietf.utils.
- Legacy-Id: 138
utilities into separate files.
* Added a log() function in ietf/utils. It uses syslog, but adds some
information about where it was called from.
- Legacy-Id: 130
