Add LIBRARY section to each man page

doc/man/man3/lber-decode.3

doc/man/man3/lber-encode.3

doc/man/man3/lber-memory.3

doc/man/man3/lber-types.3

doc/man/man3/ldap.3

doc/man/man3/ldap_abandon.3

doc/man/man3/ldap_add.3

doc/man/man3/ldap_bind.3

doc/man/man3/ldap_cache.3

doc/man/man3/ldap_compare.3

doc/man/man3/ldap_delete.3

doc/man/man3/ldap_error.3

doc/man/man3/ldap_first_attribute.3

doc/man/man3/ldap_first_entry.3

doc/man/man3/ldap_first_message.3

doc/man/man3/ldap_first_reference.3

doc/man/man3/ldap_get_dn.3

doc/man/man3/ldap_get_values.3

doc/man/man3/ldap_modify.3

doc/man/man3/ldap_modrdn.3