EUDC: Port BBDB backend to BBDB >= 3

EUDC: Port BBDB backend to BBDB >= 3

* lisp/net/eudcb-bbdb.el (eudc-bbdb-field): Convert BBDB < 3
field names to BBDB >= 3 field names.
(eudc-bbdb-format-query): Support old
and new BBDB field names.
(eudc-bbdb-filter-non-matching-record): Add support for both
BBDB < 3 field names and BBDB >= 3 field names.
(eudc-bbdb-extract-phones): Likewise.
(eudc-bbdb-extract-addresses): Likewise.
(eudc-bbdb-format-record-as-result): Likewise.
* doc/misc/eudc.texi (Creating BBDB Records): Document EUDC
BBDB field name support.