Zabbix

...G...... [DEV-4056] created and implemented in some places procfs.Parser to unify reading from the files

Merge in ZBX/zabbix from feature/DEV-4056-7.5 to master

* commit '893ede137dd2741da5f72904cc78d48c096b7ff1': (38 commits)
  ...G...... [DEV-4056] resolved issue with windows i386 compilation
  ...G...... [DEV-4056] resolved issue with windows compilation
  ...G...... [DEV-4056] fixed copyright
  ...G...... [DEV-4056] style improvements
  ...G...... [DEV-4056] removed validation in parser that creates false sense of security.
  ...G...... [DEV-4056] improved parser's validations bypass
  ...G...... [DEV-4056] improved allowlist of the parser
  ...G...... [DEV-4056] improved parser file opening message.
  ...G...... [DEV-4056] fixed unit test
  ...G...... [DEV-4056] cleaning up for PR
  ...G...... [DEV-4056] added back darwin system.boottime and net.udp.listen keys after removed them for unix
  ...G...... [DEV-4056] fixed linter issues
  ...G...... [DEV-4056] improved parser default mode, so it would be good for most use cases with minimal drawbacks
  ...G...... [DEV-4056] fixed newline issues
  ...G...... [DEV-4056] updated parser for consistency
  ...G...... [DEV-4056] added unit tests for net.if.collisions, net.if.in, net.if.out, net.if.total, net.if.discovery
  ...G...... [DEV-4056] added unit tests for kernel.maxfiles, kernel.maxproc, kernel.openfiles
  ...G...... [DEV-4056] added unit tests for system.boottime
  ...G...... [DEV-4056] some adjustments in net.udp.listen
  ...G...... [DEV-4056] covered net.udp.listen with unit tests
  ...