give some love to x/oauth2

[andig]

As regular user of x/oauth2 outside of the common providers I've noticed that x/oauth has a semi-abandoned feeling to it.

Readme links to abandoned Travis:

• Travis build status is broken oauth2#640

Resolved issues are not closed:

• Make expiryDelta in token.go configurable oauth2#481

An, most importantly, x/oauth2 could offer a lot more flexibility for more than basic use cases with very little additional api looking at these issues:

• Make RetrieveToken usable by client packages oauth2#354
• Add additional headers during token refresh oauth2#483
• Unmarshal expires_in outside of oauth2/internal oauth2#484
• Config: Refresh Token Request with Custom Parameters oauth2#521
• Non-standard token response oauth2#526
• custom exchange request attribute/header oauth2#533

Requests for feedback on open issues are not answered. Of course the Go team sets the priorities- however I'd like to raise the point of community need for more oauth2 flexibility.

/cc @sagikazarmark

[seankhliao]

Duplicate of #56402

[hickford]

#56402 (comment)

https://dev.golang.org/owners records the primary x/oauth2 code owner as @bradfitz. Secondary owners are @rakyll @broady @shinfan @codyoss. The responsibilities of code owners aren't documented. It looks like reviews are automatically assigned to the primary owner.

There are many open reviews https://go-review.googlesource.com/q/project:oauth2+status:open but the code owners are inactive.

Any volunteers for new owners?