Fix debug logs on ENABLE_DEBUG_LOGS (bctoolbox removed bctbx_debug definition if BCTBX_DEBUG_MODE wasn't set).
Fix displaying debug logs on tester.
Fix leak to friends (linphone_friend_get_phone_numbers return a bxtbx_strdup array so we need to free data).
Fix type casting to a debug log.

New features on LDAP:
- Allow multiple values for a configuration keys.
- 'server' key will now accept multiple urls for a fallback process when request cannot be done.
- Add support to SRV records.
- Add a timeout on TLS when trying to reach a server (timeout_tls_ms)
- Fix LDAP leak on error.
- Remove unnecessary optimizations.
- Fix a crash on getting a search result whithout having one.

Cleanup code and stabilization.
bool_t => bool.
Revert Ldap params matrix to array and use string references to be usable from Wrapper API.