lws minimal secure streams stress

This is the same as minimal-secure-streams, except you can have it perform concurrent SS connections and a budget of sequential connections.

It basically forks as many times as -c <concurrent> and each fork does --budget <count> SS connections one after the other.

build

 $ cmake . && make

Commandline option	Meaning
-d <loglevel>	Debug verbosity in decimal, eg, -d15
-c <concurrent>	Fork this many times on init
--budget <count>	Each fork sequentially does this many SS connections (default 1)
--pass-limit <count>	By default the pass limit is the budget, but if doing fault injection you can set a lower limit here