Czech translation updates from Karel Zak

src/bin/pg_controldata/nls.mk

src/bin/pg_controldata/po/cs.po

src/bin/pg_dump/po/cs.po

src/bin/pg_resetxlog/nls.mk

src/bin/pg_resetxlog/po/cs.po

src/bin/psql/po/cs.po

src/bin/scripts/nls.mk

src/bin/scripts/po/cs.po

src/interfaces/libpq/po/cs.po