bloat query: fix totalwastedbytes

totalwastedbytes returned only the number of wasted pages - fix that by
multiplying with the blocksize
Don't swallow space before the -c flag when reporting errors
Merge branch 'master' of github.com:terrorobe/check_postgres
fix & extend hot_standby_delay documentation

This should also account for all places where the refactoring of
the numbered dbparameters (host2, port2, etc.) was referenced in the
documentation. Drop the TODO entry.
Merge branch 'master' of https://github.com/terrorobe/check_postgres

Conflicts:
	check_postgres.pl
Merge branch 'space_error' of https://github.com/jeffjanes/check_postgres