MySQL authentication with user@host

MySQL authentication with user@host: user, host and pass word are
loaded from backend servers.
Host is currently handled as IPv4 address
MySQL authentication with user@host, resolved compile errors

MySQL authentication with user@host, resolved compile errors
uh_cmpfun: resolved error in NULL check

uh_cmpfun: resolved error in NULL check
set dcb->ipv4 for mysql user@host authentication

set dcb->ipv4 for mysql user@host authentication