[BBDB] ChangLog 2018-03-30

The changes described below unify the handling of new records, new
fields and modified fields.  Previously the handling of these things
was somewhat inconsistent.  Depending on how you added a new record
to BBDB or modified an existing record, BBDB performed different
checks (in particular when bbdb-allow-duplicates is nil).  Now this
is handled more consistently by always calling the same functions.

2018-03-30  Roland Winkler  <[email protected]>
	Unify handling of new records, new fields and modified fields.

	* bbdb.el (bbdb-check-name): Handle both names and akas.  New
	optional arg warn.
	(bbdb-check-mail): New function.
	(bbdb-register-record): Use bbdb-check-name and bbdb-check-mail.
	New optional arg warn.
	(bbdb-change-record): Fix docstring.

	* bbdb.el (bbdb-record-set-field):
	* bbdb-com.el (bbdb-read-record, bbdb-create-internal):
	Use bbdb-check-name and bbdb-check-mail.

	* bbdb-com.el (bbdb-record-edit-address): Allow arg address be nil
	for new addresses.
	(bbdb-record-edit-phone): Operate only on the phone number that we
	change.
	(bbdb-read-record, bbdb-read-field): Use bbdb-record-edit-phone.
	Always use bbdb-record-set-field.