new spanish translations

Patchers,

pg_ctl and initdb spanish translation files are attached. Please apply.
Note that they have to be added to both nls.mk files.

I found some inconsistencies in the messages ... will submit a patch
later.

$ LC_ALL=C msgfmt -c -v initdb.es.po
83 translated messages.

$ LC_ALL=C msgfmt -c -v pg_ctl.es.po
83 translated messages.

--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"Hoy es el primer d�a del resto de mi vida"