Pull request: all: imp new plat docs

Updates #2441.
Updates #2443.

Squashed commit of the following:

commit 6e5218916753bffb91f9fc6d5a546487add620d5
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Jun 1 15:56:21 2021 +0300

    all: imp new plat docs

internal/home/service.go

@@ -282,7 +282,8 @@ func handleServiceUninstallCommand(s service.Service) {
 func configureService(c *service.Config) {
 	c.Option = service.KeyValue{}
 
-	// OS X
+	// macOS
+
 	// Redefines the launchd config file template
 	// The purpose is to enable stdout/stderr redirect by default
 	c.Option["LaunchdConfig"] = launchdConfig
@@ -290,6 +291,7 @@ func configureService(c *service.Config) {
 	c.Option["RunAtLoad"] = true
 
 	// POSIX
+
 	// Redirect StdErr & StdOut to files.
 	c.Option["LogOutput"] = true