Apply "[irc-security] BOPM patch for MikroTik HttpProxy, possibly others"

Apply "[irc-security] BOPM patch for MikroTik HttpProxy, possibly others"

<redacted>:

Here's a quick patch for BOPM-3.1.3 which will help the HTTP CONNECT
scanner catch MikroTik HttpProxies (and any other quirky implementations
which require some initial data before activating the tunnel).

Terrence Koeman kindly tested the patched BOPM vs unpatched BOPM
performance against the current proxybl database, and while the patched
BOPM appears to have caught everything, the unpatched BOPM missed ~150
out of ~4600.