Log Message:
py-ldap3: updated to 2.6

2.6:
- fixed empty digestMd5.py file in 2.5.2 package
- explicitly declare digest module md5 in util.ntlm
- change object passed to modify() was unexpectedly mutated
- added LDAPInfoError exception
- added Server.has_control(control) method to check if a server has a specific \ 
control
- added Server.has_extension(extension) method to check if a server has a \ 
specific extension
- added Server.has_feature(feature) method to check if a server has a specific \ 
feature
- fixed checking of \\ in safe_dn
- fixed uuid checking with 5c byte value
- added single=True parameter to the ServerPool object definition. Servers state \ 
is shared between connections using the same pool
- updated copyright notice