Stageless payloads need to have the socket FD left along (ie. 0)
otherwise each of them will think that the socket is already open.
Instead we need to make sure it's left as 0 as per the configuration and
from there the stageless code will fire up a new socket based on the
transport in question.
Methods now require a hash. I went with the hash because 1) that's what
we seem to use everywhere else, and 2) I couldn't get the new keyword
arguments working nicely with the block syntax (I'm clearly stupid).
This commit adds plumbing which allows for the creation of stageless
meterpreter payloads that include extensions. The included transprots at
this point are bind_tcp, reverse_tcp and reverse_https, all x86.
More coming for x64. Will also validate http soon.
OJ