* add new directive in the global scope `certificates_directory` which is used to bulk load certs and trust them in Authelia
* this is in ADDITION to system certs and are trusted by both LDAP and SMTP
* added a shared TLSConfig struct to be used by both SMTP and LDAP, and anything else in the future that requires tuning the TLS
* remove usage of deprecated LDAP funcs Dial and DialTLS in favor of DialURL which is also easier to use
* use the server name from LDAP URL or SMTP host when validating the certificate unless otherwise defined in the TLS section
* added temporary translations from the old names to the new ones for all deprecated options
* added docs
* updated example configuration
* final deprecations to be done in 4.28.0
* doc updates
* fix misc linting issues
* uniform deprecation notices for ease of final removal
* added additional tests covering previously uncovered areas and the new configuration options
* add non-fatal to certificate loading when system certs could not be loaded
* adjust timeout of Suite ShortTimeouts
* add warnings pusher for the StructValidator
* make the schema suites uninform
* utilize the warnings in the StructValidator
* fix test suite usage for skip_verify
* extract LDAP filter parsing into it's own function to make it possible to test
* test LDAP filter parsing
* update ErrorContainer interface
* add tests to the StructValidator
* add NewTLSConfig test
* move baseDN for users/groups into parsed values
* add tests to cover many of the outstanding areas in LDAP
* add explicit deferred LDAP conn close to UpdatePassword
* add some basic testing to SMTP notifier
* suggestions from code review
* add start_tls config option
* add StartTLS method to the LDAP conn factory and the mock
* implemented use of the StartTLS method when the config is set to true
* add mock unit tests
* add docs
* add TLS min version support
* add tests to tls version method
* fix lint issues
* minor adjustments
* remove SSL3.0
* add tls consts
* deprecate old filter placeholders
* remove redundant fake hashing in file auth provider (to delay username enumeration, was replaced by #993
* make suite ActiveDirectory use StartTLS
* misc adjustments to docs
* suggested changes from code review
* deprecation notice conformity
* add mock test for LDAPS plus StartTLS
James Elliott
Amir Zarrinkafsh
Clement Michaud