Update Dockerfile to build webdis with SSL support
Update Dockerfile to build webdis with SSL support

Two binaries are built and packaged:
* /usr/local/bin/webdis -- still without SSL and does not depend on
  OpenSSL
* /usr/local/bin/webdis-ssl -- supports SSL, depends on OpenSSL but has
  to be used with the webdis image as a base image or in a container
  injecting the webdis config and certs.

nicolasff/webdis,nicolasff/webdis,nicolasff/webdis,nicolasff/webdis,nicolasff/webdis