Merge the projects/entities branch into head/

The primary purposes are to clean up duplicated author definitions in
both share/xml/authors.ent and share/xml/developers.ent, and as a added
bonus simplify writing up author names/email addresses in web pages.

Apart from merging developers.ent into authors.ent, removing the former,
and updating the Committers Guide there should be little user-visible changes:
- a.portmgr renamed to a.portmgr.members
- a.doceng renamed to a.doceng.members
- team.re renamed to a.re.members.email and moved from
share/xml/freebsd.ent to share/xml/authors.ent
- a.core updated and moved from share/xml/mailing-lists.ent to
share/xml/teams.ent
- share/pgpkeys/{addkey.sh|README} updated

Translations are untouched except for build fixes.

Approved by:	doceng (gjb)
Approved by:	gjb (mentor)

en_US.ISO8859-1/share/xml/mailing-lists.ent

@@ -75,7 +75,6 @@
 <!ENTITY a.committers "FreeBSD committer's mailing list">
 <!ENTITY a.committers.name "cvs-committers">
 
-<!ENTITY a.core "FreeBSD core team">
 <!ENTITY a.core.name "freebsd-core">
 
 <!ENTITY a.current.url "&a.mailman.listinfo;/freebsd-current">