Update masscan.8.markdown

  *  `--readscan <binary-files>`: reads the files created by the `-oB` option

    from a scan, then outputs them in one of the other formats, depending

    on command-line parameters. In other words, it can take the binary

    version of the output and convert it to an XML or JSON format.

    version of the output and convert it to an XML or JSON format. When this option

    is given, defaults from `/etc/masscan/masscan.conf` will not be read.

  * `--connection-timeout <secs>`: when doing banner checks, this specifies the

    maximum number of seconds that a TCP connection can be held open. The default

    is 30 seconds. Increase this time if banners are incomplete. For example,

    we have to increase the timeout when downloading all the SSL certs from

    the Internet, because some sites take that long to deliver all the certs

    in the chain. However, beware that when this is set to a large value, it'll

    consume a lot of memory on fast scans. While the code may handle millions of 

    open TCP connections, you may not have enough memory for that.

## CONFIGURATION FILE FORMAT