support dynamic redirect_uri based on incoming 'host' header (#13666)

This feature is useful in situations when console is exposed
over multiple intranent or internet entities when users are
connecting over local IP v/s going through load balancer.

Related console work was merged here

373bfbfe3f

internal/config/identity/openid/help.go

@@ -50,18 +50,6 @@ var (
 			Optional:    true,
 			Type:        "on|off",
 		},
-		config.HelpKV{
-			Key:         ClaimPrefix,
-			Description: `[DEPRECATED use 'claim_name'] JWT claim namespace prefix e.g. "customer1/"`,
-			Optional:    true,
-			Type:        "string",
-		},
-		config.HelpKV{
-			Key:         RedirectURI,
-			Description: `[DEPRECATED use env 'MINIO_BROWSER_REDIRECT_URL'] Configure custom redirect_uri for OpenID login flow callback`,
-			Optional:    true,
-			Type:        "string",
-		},
 		config.HelpKV{
 			Key:         Scopes,
 			Description: `Comma separated list of OpenID scopes for server, defaults to advertised scopes from discovery document e.g. "email,admin"`,
@@ -86,6 +74,24 @@ var (
 			Optional:    true,
 			Type:        "string",
 		},
+		config.HelpKV{
+			Key:         RedirectURIDynamic,
+			Description: `Enable 'Host' header based dynamic redirect URI`,
+			Optional:    true,
+			Type:        "on|off",
+		},
+		config.HelpKV{
+			Key:         ClaimPrefix,
+			Description: `[DEPRECATED use 'claim_name'] JWT claim namespace prefix e.g. "customer1/"`,
+			Optional:    true,
+			Type:        "string",
+		},
+		config.HelpKV{
+			Key:         RedirectURI,
+			Description: `[DEPRECATED use env 'MINIO_BROWSER_REDIRECT_URL'] Configure custom redirect_uri for OpenID login flow callback`,
+			Optional:    true,
+			Type:        "string",
+		},
 		config.HelpKV{
 			Key:         config.Comment,
 			Description: config.DefaultComment,