* 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
* added regulation validator
* made regulations find_time and ban_time values duration notation strings
* added DefaultRegulationConfiguration for the validator
* made session expiration and inactivity values duration notation strings
* TOTP period does not need to be converted because adjustment should be discouraged
* moved TOTP defaults to DefaultTOTPConfiguration and removed the consts
* arranged the root config validator in configuration file order
* adjusted tests for the changes
* moved duration notation docs to root of configuration
* added references to duration notation where applicable
* project wide gofmt and goimports:
* run gofmt
* run goimports -local github.com/authelia/authelia -w on all files
* Make jwt_secret error uniform and add tests
* now at 100% coverage for internal/configuration/validator/configuration.go
James Elliott
Amir Zarrinkafsh
Clement Michaud