First steps in using lua to update HAProxy for a DOCKER SNI configuration

• penlight
• template
• text
• socket
• socket.unix
• json

Used as Dockerbase for development and I'll use it for the 'final' image.

so don't shoot me

Whats working:

• getting /containers/json
• getting /containers/xxxidxxxid/json (probably not needed for my configuration)j
• filling in a haproxy.tmpl using > for lua code and $(var) for text replace

I've made my own http lib over socket.unix. This is an intermediate step, next step whould be to use the existing http lib over socket.unix

Kind of the first or second time using Lua as script language. So there are some intermediate files, to test some snippet code.