Pull request: home: beta http server errorss are not fatal

Merge in DNS/adguard-home from http-beta-no-fatal to master

Squashed commit of the following:

commit 13dcf7bca6d156f387639906c778fd6b07f491f3
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Fri Feb 12 17:58:01 2021 +0300

    home: beta http server errorss are not fatal

internal/home/web.go

@@ -191,7 +191,10 @@ func (web *Web) Start() {
 				WriteTimeout:      web.conf.WriteTimeout,
 			}
 			go func() {
-				errs <- web.httpServerBeta.ListenAndServe()
+				betaErr := web.httpServerBeta.ListenAndServe()
+				if betaErr != nil {
+					log.Error("starting beta http server: %s", betaErr)
+				}
 			}()
 		}