extra sanity check to ensure not too many file descriptors are open (r1935 from 0.8, a9aea20 from 0.9)

git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-pam-ldapd-0.7@2059 ef36b2f9-881f-0410-afb5-c4e39611909c
fix for common spelling mistake (8571bc1 from 0.9, r2055 from 0.8)

git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-pam-ldapd-0.7@2060 ef36b2f9-881f-0410-afb5-c4e39611909c