safe_string_free was freeing the string value, so we have to save it.

First step in new schema support.

Add schema support

Change to be in line with libldap, i.e. add schema

values will obscure EOF condition on closed sockets.

This will facilate version.c generation on non-UNIX systems.

prototype in ldap-int.h.

Incorporate #define's per Kurt's suggestion

to avoid accessing c_conn_state after close.

AM_INIT_AUTOMAKE.

locking requires and possibly restructure locking.

part fails if it does.

Fix compilation errors, mod declared as LDAPMod, but used inconsistently
as LDAPMod (but incorrectly).  Please review this change, I am not sure
I understood what was intended.

Provide human-readable syntax errors.

Provide human-readable errors.