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.

--- a/src/os/unix/ngx_errno.c
+++ b/src/os/unix/ngx_errno.c
@@ -12,7 +12,7 @@
  * The strerror() messages are copied because:
  *
  * 1) strerror() and strerror_r() functions are not Async-Signal-Safe,
- *    therefore, they can not be used in signal handlers;
+ *    therefore, they cannot be used in signal handlers;
  *
  * 2) a direct sys_errlist[] array may be used instead of these functions,
  *    but Linux linker warns about its usage: