docs: short aliases [ci skip]

cli/server/add.go

@@ -10,8 +10,9 @@ import (
 
 var serverAddCommand = &cli.Command{
 	Name:        "add",
-	Usage:       "Add a new server, reachable on <host>.",
-	ArgsUsage:   "<host> [<user>] [<port>]",
+	Usage:       "Add a new server, reachable on <server>.",
+	Aliases:     []string{"a"},
+	ArgsUsage:   "<server> [<user>] [<port>]",
 	Description: "[<user>], [<port>]    SSH connection details",
 	Action: func(c *cli.Context) error {
 		argLen := c.Args().Len()

cli/server/init.go

@@ -18,6 +18,7 @@ import (
 var serverInitCommand = &cli.Command{
 	Name:      "init",
 	Usage:     "Initialise server for deploying apps",
+	Aliases:   []string{"i"},
 	HideHelp:  true,
 	ArgsUsage: "<server>",
 	Description: `

cli/server/remove.go

@@ -10,9 +10,13 @@ import (
 )
 
 var serverRemoveCommand = &cli.Command{
-	Name:     "remove",
-	Aliases:  []string{"rm", "delete"},
-	Usage:    "Remove a locally-defined server",
+	Name:    "remove",
+	Aliases: []string{"rm"},
+	Usage:   "Remove a server",
+	Description: `
+This does not destroy the actual server. It simply removes it from Abra
+internal bookkeeping so that it is not managed any more.
+`,
 	HideHelp: true,
 	Action: func(c *cli.Context) error {
 		server := c.Args().First()