Fix for #44 log line containing URL made of RemoteAddr

Now will put content of Host: header.
update copyright year
Initial TLS support for #17

* added command line flags for ssl mode
* HTTPS=on variable to environment
* HTTPS variable to examples
* default port 443 or 80 depending on ssl flag

Also added support for re-writing SERVER_SOFTWARE in cgi handler.

Also fixes #32 bug where Firefox was not able to render devconsole due to use of non standard-prescribed innerText property.
Merge pull request #47 from asergeyev/master

#17 fix pull request
Implementing --passenv feature to solve security weakness (#4)

(squashed commits)
Merge pull request #52 from asergeyev/passenv

Implementing --passenv feature to solve security weakness (#4)
Adding an ability to limit max number of concurrent forks

* to the best of my ability the lib is backwards compatible
* main.go would be not able to compile with old library
* all fork denials end up in HTTP 429 response
* new commandline option called --maxforks and affects CGI and ws handlers
Merge between maxforks and passenv feature implementations
Merge pull request #54 from asergeyev/maxconn

Limiting max number of forks #46
Added missing access logging to devconsole handler.