emu: disable by default
tcp_emu() from the ancient slirp is known to have caused several CVEs, and not useful today in most cases.
https://nvd.nist.gov/vuln/detail/CVE-2019-6778 https://nvd.nist.gov/vuln/detail/CVE-2019-9824
The feature can be still enabled by setting SlirpConfig.enable_emu
to true
.
Closes #11 (closed)