REORG: cli: move "{enable|disable} server" to server.c

Also mention that "set server" is preferred now.
diff --git a/src/cli.c b/src/cli.c
index 09e2520..50f47ae 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -691,16 +691,6 @@
 			sv->check.state |= CHK_ST_ENABLED;
 			return 1;
 		}
-		else if (strcmp(args[1], "server") == 0) {
-			struct server *sv;
-
-			sv = expect_server_admin(s, si, args[2]);
-			if (!sv)
-				return 1;
-
-			srv_adm_set_ready(sv);
-			return 1;
-		}
 		else { /* unknown "enable" parameter */
 			appctx->ctx.cli.msg = "'enable' only supports 'agent', 'frontend', 'health', and 'server'.\n";
 			appctx->st0 = STAT_CLI_PRINT;
@@ -728,16 +718,6 @@
 			sv->check.state &= ~CHK_ST_ENABLED;
 			return 1;
 		}
-		else if (strcmp(args[1], "server") == 0) {
-			struct server *sv;
-
-			sv = expect_server_admin(s, si, args[2]);
-			if (!sv)
-				return 1;
-
-			srv_adm_set_maint(sv);
-			return 1;
-		}
 		else { /* unknown "disable" parameter */
 			appctx->ctx.cli.msg = "'disable' only supports 'agent', 'frontend', 'health', and 'server'.\n";
 			appctx->st0 = STAT_CLI_PRINT;
diff --git a/src/server.c b/src/server.c
index 53db7e4..81f345c 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3583,8 +3583,42 @@
 	return 1;
 }
 
+/* parse a "disable server" command. It always returns 1. */
+static int cli_parse_disable_server(char **args, struct appctx *appctx, void *private)
+{
+	struct server *sv;
+
+	if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
+		return 1;
+
+	sv = cli_find_server(appctx, args[2]);
+	if (!sv)
+		return 1;
+
+	srv_adm_set_maint(sv);
+	return 1;
+}
+
+/* parse a "enable server" command. It always returns 1. */
+static int cli_parse_enable_server(char **args, struct appctx *appctx, void *private)
+{
+	struct server *sv;
+
+	if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
+		return 1;
+
+	sv = cli_find_server(appctx, args[2]);
+	if (!sv)
+		return 1;
+
+	srv_adm_set_ready(sv);
+	return 1;
+}
+
 /* register cli keywords */
 static struct cli_kw_list cli_kws = {{ },{
+	{ { "disable", "server",  NULL }, "disable server : disable a server for maintenance (use 'set server' instead)", cli_parse_disable_server, NULL },
+	{ { "enable", "server",  NULL }, "enable server  : enable a disabled server (use 'set server' instead)", cli_parse_enable_server, NULL },
 	{ { "set", "maxconn", "server",  NULL }, "set maxconn server : change a server's maxconn setting", cli_parse_set_maxconn_server, NULL },
 	{ { "set", "server", NULL }, "set server     : change a server's state, weight or address",  cli_parse_set_server },
 	{ { "get", "weight", NULL }, "get weight     : report a server's current weight",  cli_parse_get_weight },