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/xslt10-freebsd.dtd

@@ -10,10 +10,10 @@
         "http://www.FreeBSD.org/XML/doc/share/xml/man-refs.ent">
 %man-refs.ent;
 
-<!ENTITY % developers.ent
+<!ENTITY % authors.ent
  PUBLIC "-//FreeBSD//ENTITIES FreeBSD Developers Entities//EN"
-        "http://www.FreeBSD.org/XML/doc/share/xml/developers.ent">
-%developers.ent;
+        "http://www.FreeBSD.org/XML/doc/share/xml/authors.ent">
+%authors.ent;
 -->
 
 <!ENTITY % autogen.ent