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)

share/xml/freebsd.ent

@@ -98,9 +98,6 @@ used in both environments.
 <!ENTITY os.numports "24,000">
 <!ENTITY ports.size "500&nbsp;MB">
 
-<!-- Teams and Hats -->
-<!ENTITY team.re "&a.kib;, &a.blackend;, &a.jpaetzel;, &a.hrs;, &a.kensmith;">
-
 <!-- GUI-buttons -->
 <!ENTITY gui.ok "<guibutton>[&nbsp;OK&nbsp;]</guibutton>">
 <!ENTITY gui.cancel "<guibutton>[&nbsp;Cancel&nbsp;]</guibutton>">