Change log for MCAFEE_WEBPROXY

Date Changes
2023-06-17 Enhancement-
- Mapped "sr_bytes" to "network.send_bytes".
- Mapped "user" to "principal.user.userid".
- Mapped "client_ip" to "principal.ip".
2023-05-31 Bug-fix-
- Added Grok pattern to parse logs failing due to extra '-' in CSV format logs.
2023-01-27 Enhancement-
- Mapped "requested_host" and "requested_path" to "target.url".
- Mapped "username" to "principal.user.userid".
- Mapped "destination_ip" to "target.ip".
- Mapped "destination_port" to "target.port".
- Mapped "client_ip" to "intermediary.ip".
- Mapped 'user_agent' to 'network.http.parsed_user_agent'.
2023-01-16 Enhancement-
- Added grok pattern for unparsed log.
- Mapped "target_ip" to "target.ip".
- Mapped "response_code" to "network.http.response_code".
- Mapped "category_details" to "security_result.category_details".
- Mapped "risk" to "security_result.category_details".
2022-09-21 Merged customer specific parser to default.
Added Mapping for unparsed log.
- Added on error check for "kv_entry.server_ip","kv_entry.method",kv_entry.src_ip","kv_entry.server_ip","kv_entry.url_port","kv_entry.url","kv_entry.status_code"
"kv_entry.auth_user","kv_entry.host","kv_entry.user_agent","kv_entry.bytes_from_client","kv_entry.bytes_to_client,"kv_entry.rep_level,"kv_entry.block_reason",kv_entry.categories","kv_entry.application_name","kv_entry.block_res"