Merging r4132, r4134, r4143, r4183, r4191, r4199: Various fixes related to error messages: *) Removed old warning that suggested to use "server_name_in_redirect off" (now the default) in place of no longer supported "server_name *". *) Fixing directive name in error message if types hash size is not enough. *) Replaced "can not" with "cannot" and "could not" in a bunch of places. Fixed nearby grammar errors. *) Overhauled error messages.