Pull request 2305: 7400 Disable permcheck

Updates #7400.

Squashed commit of the following:

commit f6508d395288dfa5ed0b9aa2e714bc1eba72d243
Merge: aa7119648 d96e65cb0
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Fri Nov 22 15:43:27 2024 +0300

    Merge branch 'master' into 7400-disable-perm

commit aa7119648bae3f2ff6af96215c3c8eab70b379ea
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Nov 20 16:51:37 2024 +0300

    next: add flag

commit c16b90918f5a9493876e3d16776fb18f67cbc09b
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Nov 20 16:42:47 2024 +0300

    home: fix help

commit 2e096c0e320599b9472f55a47c1abbc95e1a9f8e
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Nov 20 16:37:30 2024 +0300

    all: imp code, log changes

commit 368598819fc339cc1dbf788d092af9e4c5191f30
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Nov 20 16:12:18 2024 +0300

    home: add permcheck option

internal/home/options.go

@@ -78,6 +78,10 @@ type options struct {
 	// localFrontend forces AdGuard Home to use the frontend files from disk
 	// rather than the ones that have been compiled into the binary.
 	localFrontend bool
+
+	// noPermCheck disables checking and migration of permissions for the
+	// security-sensitive files.
+	noPermCheck bool
 }
 
 // initCmdLineOpts completes initialization of the global command-line option
@@ -305,6 +309,15 @@ var cmdLineOpts = []cmdLineOpt{{
 	description:     "Run in GL-Inet compatibility mode.",
 	longName:        "glinet",
 	shortName:       "",
+}, {
+	updateWithValue: nil,
+	updateNoValue:   func(o options) (options, error) { o.noPermCheck = true; return o, nil },
+	effect:          nil,
+	serialize:       func(o options) (val string, ok bool) { return "", o.noPermCheck },
+	description: "Skip checking and migration of permissions " +
+		"of security-sensitive files.",
+	longName:  "no-permcheck",
+	shortName: "",
 }, {
 	updateWithValue: nil,
 	updateNoValue:   nil,