Merge branch 'pr/martindb/298'

Merge branch 'pr/airbornemint/296'

vouch#266 add cookie.domain when allowAllUsers: true

fix vouch#290 add Azure AD

fix vouch#289 allow `rd`param to support Nginx Ingress

Merge branch 'master' of github.com:vouch/vouch-proxy

vouch#282 error out after six failed login attempts

Squashed commit of the following:

commit a3e33f9
Merge: 0ea425f 054bff3
Author: Benjamin Foote <git@bnf.net>
Date:   Thu Jun 25 13:44:23 2020 -0700

    Merge branch 'master' into pr/yaws-k/279

commit 0ea425f
Author: Benjamin Foote <git@bnf.net>
Date:   Thu Jun 25 13:44:12 2020 -0700

    vouch#266 clarify protected domain

commit 2b68660
Author: Yosuke Kato <55400564+yaws-k@users.noreply.github.com>
Date:   Sun Jun 14 14:27:22 2020 +0900

    Add vouch.cookie.domain description to allAllUsers configuration.

Squashed commit of the following:

commit aed8416
Author: Benjamin Foote <git@bnf.net>
Date:   Thu Jun 25 13:23:31 2020 -0700

    vouch#281 gofmt, minor edits

commit c38b05d
Author: Benjamin Foote <git@bnf.net>
Date:   Thu Jun 25 13:23:15 2020 -0700

    vouch#281 compile regex once, use cfg.Branding

commit d9cb3f6
Author: Benjamin Foote <git@bnf.net>
Date:   Thu Jun 25 13:20:01 2020 -0700

    error on empty URL

commit 4adbaad
Author: Ben Artin <ben@artins.org>
Date:   Thu Jun 25 12:57:06 2020 -0400

    Fixed handling of multiple vouch params in login request

commit dfc6cb3
Author: Ben Artin <ben@artins.org>
Date:   Thu Jun 25 12:59:24 2020 -0400

    Allow ‘error’ param

commit e50e1aa
Author: Ben Artin <ben@artins.org>
Date:   Thu Jun 25 12:29:16 2020 -0400

    Clarified README unit tests

commit dabee5c
Author: Ben Artin <ben@artins.org>
Date:   Thu Jun 25 12:28:32 2020 -0400

    Log about url normalization

commit c1b37a7
Author: Benjamin Foote <git@bnf.net>
Date:   Wed Jun 24 12:17:02 2020 -0700

    vouch#281 add tests for README 302 syntax

commit ddbea36
Author: Ben Artin <ben@artins.org>
Date:   Tue Jun 23 17:23:25 2020 -0400

    Allow semicolon as param separator in URL

    https://www.w3.org/TR/html401/appendix/notes.html#h-B.2.2

commit f27d4b1
Author: Ben Artin <ben@artins.org>
Date:   Tue Jun 23 16:59:31 2020 -0400

    Added tests for the case of vouch param before url param

commit 5b4c71d
Author: Ben Artin <ben@artins.org>
Date:   Tue Jun 23 16:59:05 2020 -0400

    Unambiguous test name

commit 881dfc2
Author: Ben Artin <ben@artins.org>
Date:   Sat Jun 20 04:21:01 2020 -0400

    More robust parsing of url param to login; see vouch#281

Merge branch 'bug/278_dontcache401'