removed multi/

use them anyway and they cause warnings in lib/mprint.c

-W -Wall -Wwrite-strings -pedantic -g

to check libs and include files in, we don't check the default places first!

as they depend on the resolving of that name. It seems this mistake is
happening from time to time and people have a hard time finding out why
configure can't detect their gethostbyname_r()-setup.

properly! (?) Anyone has any better solution then please step forward!

to

that have been built-in

allow this script to simply detect a gethostbyname_r() if it can't figure
out how to use it. From now on, this script will fail when that happens.