pgsql: Revert sentence removal from nickname in FAQ.

Log Message:
-----------
Revert sentence removal from nickname in FAQ.

Modified Files:
--------------
    pgsql/doc/src/FAQ:
        FAQ.html (r1.409 -> r1.410)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/FAQ.html?r1=1.409&r2=1.410)
    pgsql/src/backend/optimizer:
        README (r1.43 -> r1.44)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/README?r1=1.43&r2=1.44)
    pgsql/src/backend/parser:
        README (r1.7 -> r1.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/README?r1=1.7&r2=1.8)
    pgsql/src/backend/utils/mmgr:
        README (r1.12 -> r1.13)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/README?r1=1.12&r2=1.13)