Fix comments [ci skip]

fix comments of `func main()`
closes #2946

plugins/network/src/triggers/network-config-exists/network-config-exists.go

@@ -8,7 +8,7 @@ import (
 	"github.com/dokku/dokku/plugins/network"
 )
 
-// write the ipaddress to stdout for a given app container
+// writes true or false to stdout whether a given app has network config
 func main() {
 	flag.Parse()
 	appName := flag.Arg(0)

plugins/network/src/triggers/network-get-property/network-get-property.go

@@ -9,7 +9,7 @@ import (
 	network "github.com/dokku/dokku/plugins/network"
 )
 
-// write the port to stdout for a given app container
+// writes the network property to stdout for a given app container
 func main() {
 	flag.Parse()
 	appName := flag.Arg(0)

plugins/network/src/triggers/post-delete/post-delete.go

@@ -6,7 +6,7 @@ import (
 	"github.com/dokku/dokku/plugins/common"
 )
 
-// write the port to stdout for a given app container
+// destroys the network property for a given app container
 func main() {
 	flag.Parse()
 	appName := flag.Arg(0)