Log Message:
exim: updated to 4.92

4.92:
New features include:
- ${l_header:<name>} expansion
- ${readsocket} now supports TLS
- "utf8_downconvert" option (if built with SUPPORT_I18N)
- "pipelining" log_selector
- JSON variants for ${extract } expansion
- "noutf8" debug option
- TCP Fast Open support on MacOS