Pull request 1807: upd-golibs

Merge in DNS/adguard-home from upd-golibs to master

Squashed commit of the following:

commit cde42a72c2140245f345681cbb936ed3bc4645a1
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Apr 7 13:57:02 2023 +0300

    all: upd golibs, use hdrs

internal/aghhttp/header.go

@@ -1,22 +1,6 @@
 package aghhttp
 
-// HTTP Headers
-
-// HTTP header name constants.
-//
-// TODO(a.garipov): Remove unused.
-const (
-	HdrNameAcceptEncoding           = "Accept-Encoding"
-	HdrNameAccessControlAllowOrigin = "Access-Control-Allow-Origin"
-	HdrNameAltSvc                   = "Alt-Svc"
-	HdrNameContentEncoding          = "Content-Encoding"
-	HdrNameContentType              = "Content-Type"
-	HdrNameOrigin                   = "Origin"
-	HdrNameServer                   = "Server"
-	HdrNameTrailer                  = "Trailer"
-	HdrNameUserAgent                = "User-Agent"
-	HdrNameVary                     = "Vary"
-)
+// HTTP headers
 
 // HTTP header value constants.
 const (