pgsql: Add language about rights given by posting a patch:

Log Message:
-----------
Add language about rights given by posting a patch:

<li>PostgreSQL is licensed under a BSD license. By posting a patch
to the public PostgreSQL mailling lists, you are giving the PostgreSQL
Global Development Group the non-revokable right to distribute your
patch under the BSD license. If you use code that is available under
some other license that is BSD compatible (eg. public domain), please
note that in your email submission.</li>

Modified Files:
--------------
pgsql/doc:
FAQ_DEV (r1.124 -> r1.125)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/FAQ_DEV.diff?r1=1.124&r2=1.125)
pgsql/doc/src/FAQ:
FAQ_DEV.html (r1.128 -> r1.129)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/FAQ_DEV.html.diff?r1=1.128&r2=1.129)