Zabbix

..F....... [ZBX-23171] fixed escaping of slash character in context based macro patterns

* commit '97fd0fecbdd950eb4d7d8b7077d4af95a250aea9':
  ..F....... [ZBX-23171] removed the redundant variable $formatted_regex
  ..F....... [ZBX-23171] simplified code
  ..F....... [ZBX-23171] fixed regular expression to handle slash escaping
  ..F....... [ZBX-23171] removed the trimming of leading and trailing slashes in regular expression of user macros with context
  ..F....... [ZBX-23171] fixed escaping of slash character in context based macro patterns