pgsql: Add offset mention: < o Add reporting of the current WAL

Log Message:
-----------
Add offset mention:

< o Add reporting of the current WAL file, perhaps as part of
< partial log file archiving

o Add reporting of the current WAL file and offset, perhaps as
part of partial log file archiving

Modified Files:
--------------
pgsql/doc:
TODO (r1.1917 -> r1.1918)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1917&amp;r2=1.1918)
pgsql/doc/src/FAQ:
TODO.html (r1.420 -> r1.421)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.420&amp;r2=1.421)