support new sec websocket protocol (version: 13)

up version

write log message with level INFO on handle end of stream error

autodetect level for attached logger

fixed creating WS Accept header value

support sec websocket protocols (ver: 7,8)

fixed xiva_check.py (threaded work with unix socket)

fixed conf examples (ulimit -n)

fixed compile error

fixed handling if error is 'Too many open files'

use strand::post() for send()

added package xiva-daemon-check

added space

fixed crash

up build version