MFen: Partial resync of the Greek share/sgml tree.

Some of the originals didn't have an en_US.ISO8859-1 revision, so they
are not really _full_ MFen of all the revisions since 1.1, just a more
recent crosscheck to see that we are truly in sync, and tagging with
the original English revision ID.

Merged files:

1.1 -> 1.2	en_US.ISO8859-1/share/sgml/articles.ent
1.1 -> 1.22	en_US.ISO8859-1/share/sgml/freebsd.dsl
1.1 -> 1.100	en_US.ISO8859-1/share/sgml/freebsd.ent

Obtained from: FreeBSD Greek translation team