[python3-ldap] A faster decoder for ldap3 1.0

[Christoph Zwerschke]

Hi Giovanni,

I remember one minor issue with ldap3, namely that some constants have 
very long names which are difficult to read and write and remember and 
also not compatible with the old ldap2 (like SEARCH_SCOPE_WHOLE_SUBTREE 
instead of SCOPE_SUBTREE). Maybe you can add the old shorter names as 
aliases in version 1.0?

-- Christoph