perform SNI enabled scan

for example, youtube requires SNI extension to be present to return
ECDSA certificates, use it for scanning
remove the folder/file part from url

some hostnames in the top-1m.csv file have folder or site specified
in them, cut it off before using
increase paralelism of jobs

because sometimes tcping takes a long time to timeout for a lot
of hosts in batch use also load average to keep the cpu busy