configuration:
- create configurable log_access_format: ascii or binary

new types:
- create protobuf type BinaryAccessLog, with subtypes
- replace lib::logs::Endpoint with proto::command::BinaryEndpoint
- use fixed32 for ipv4 addresses

refactor:
- remove log module in sozu_lib
- isolate SessionMetrics::register_end_of_session

transfer types to sozu_command_lib::logging:
- CachedTags
- RequestRecord
- LogDuration
- LogContext

avoid allocation:
- create unsafe trait DuplicateOwnership to display access logs
- intermediate buffer in the logger

Rewrite log macros:
- remove separate TAG RefCell
- move log backends and directives to InnerLogger
- allow borrow of Logger::tag and Logger::inner simultaneously
- check for Logger::enabled as soon as possible
- deduplicate log macros with/without arguments
- use scoped macro names instead of the alphabetic list

Co-Authored-By: Eloi DEMOLIS <[email protected]>

- Refactor the Logger with the new more powerful macro prompt_log
- Explicitely take ownership of RequestRecord fields in access log
  macros, the user can decide the best  way to pass them
- Add logger specific fields in the RequestRecord
- Add basic colors to logs and access logs, configurable in the condig,
  checked at runtime
- Cache the Logger::enabled result at call site

Signed-off-by: Eloi DEMOLIS <[email protected]>

Signed-off-by: Eloi DEMOLIS <[email protected]>

- Handle Logging command at worker level (not proxy)
- parse_logging_spec returns a vec of parsing errors
- Logging command takes a string for logging_filter instead of LogLevel
- Logging command fails uppon any errors of parse_logging_spec
- Logger::init ignores parse_logging_spec errors
- Reorganise some code handling commands
- Generate access log on abrupt client deconnection

Signed-off-by: Eloi DEMOLIS <[email protected]>

apply clippy suggestions

the point is to use a structure instead of a text,
for an easier parsing of the access log of the access logss

Signed-off-by: Eloi DEMOLIS <[email protected]>

Signed-off-by: Eloi DEMOLIS <[email protected]>

Co-Authored-By: Eloi DEMOLIS <[email protected]>

Co-Authored-By: Eloi DEMOLIS <[email protected]>

Co-Authored-By: Eloi DEMOLIS <[email protected]>