Increase size of config file token
Increase size of config file token

This increases the maximum size of tokens that are read from the
nslcd.conf configuration file to 256 characters. This was a problem for
some very long uri values.

Closes https://github.com/arthurdejong/nss-pam-ldapd/issues/21

arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd,arthurdejong/nss-pam-ldapd