[change] Refactoring : All the code related to database and LDAP access was...
[change] Refactoring : All the code related to database and LDAP access was refactored. Main changes: - new module SDM.pm : handles all the connection and access to the Sympa database. Now querying the Sympa database anywhere in the code can be done by calling: '&SDM::do_query($statement, @variables). all the connections, errors, statement preparation and executions are handled in the SDM module. - SQLSource and LDAPSource MUST now be manipulated through instances. the usage of class methods have been removed, because, with the exception of the Sympa database, all the usages are related to non-resident connections, so there is no usage of class instances and variables. git-svn-id: https://subversion.renater.fr/sympa/trunk@7027 05aa8bb8-cd2b-0410-b1d7-8918dfa770ce