various typo and other comment fixes (4b01125, b0785de, bfdf7cd, 4689d5f, dba048b, ebe5705 and 122c38d from 0.9)

git-svn-id: http://arthurdejong.org/svn/nss-pam-ldapd/nss-pam-ldapd-0.8@1950 ef36b2f9-881f-0410-afb5-c4e39611909c