tlspr splits the ClientHello it passes in the middle of the server name
(SNI) when the service has s_option, set by -s. In builds with splice()
(Linux, the default there) -s is splice for every service but UDP ones,
admin and httpsrv, so the split was never made, and the How-To's SNI
break did nothing on Linux.
-B sets it whatever the build: for TCP services but admin and httpsrv,
where s_option has a meaning of its own. -s still does it where it is
not splice. The How-To, 3proxy.cfg(5) and tlspr(8) give -B.
Fixes#1283
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
