This reflects the apparent intent of TestNewReverseProxy(). Without this
change, the test will fail when run without an Internet connection.

Add myusa provider

Add ProviderName field; use in sign_in template

Extract providers package

Extract api package

This is the first step towards genericizing the google_auth_proxy to support
OAuth2 providers other than Google as discussed in #65. The `api` package will
enable multiple providers to use the same `api.Request()` implementation.

request path contains full URL

Cut a new release

Request Logging:

clear cookie fix

Rename flag to set secure (https) cookies

make redirect-uri optional

Encoded slashes are expanded by the proxy

Custom Sign In Template Support

Proxied requests use the upstream Host as Host Header

Catch more options errors at once; add test

Added scheme parsing to http-address param

Can now listen for HTTP clients on unix sockets (and any other Go-supported stream oriented network - see golang.org/pkg/net/#Listen).  Default behaviour is unchanged, any http-address without a scheme is given the default of tcp.

Amended the README so that the usage output is up to date.

Run gofmt over source