added documentation for LDAP services
Merge branch 'wip' of https://github.com/Kikobeats/server-for-dummies into wip

* 'wip' of https://github.com/Kikobeats/server-for-dummies:
  fix erratas in Mail.md documentation

Conflicts:
	Documentation/Services/SMTP:POP/7. SMTP:POP.md