quick update notes below, but you should still review upstream's
RELEASENOTES.html if you use this.
- if you explicitly configure sslcrtd_program (for advanced tls mitm
configurations) you need to change from /usr/local/libexec/squid/sslcrtd
to /usr/local/libexec/squid/security_file_certgen in your config (if you
just use options on the http_port line to enable this without extra
config, this doesn't need to change).
- if using a cert helper disk cache, you may need to clear/reinitialize
the directory (not mentioned in release notes but I needed this).
- the SMB_LM helpers (for old lanmanager protocol, which should not be
used anyway) are no longer packaged, following upstream's change in default
build.