MINOR: server: unmark deprecated on enable health/agent cli

Remove the "DEPRECATED" marker on "enable/disable health/agent"
commands. Their purpose is to toggle the check/agent on a server.

These commands are still useful because their purpose is not covered by
the "set server" command. Most there was confusion with the commands
'set server health/agent', which in fact serves another goal.

Note that the indication "use 'set server' instead" has been added since
2016 on the commit
  2c04eda8b58636ad2ae44e42b1f50f3b5a24a642
  REORG: cli: move "{enable|disable} health" to server.c

and
  58d9cb7d22c1b0d8239543443131e3e3658375d0
  REORG: cli: move "{enable|disable} agent" to server.c

Besides, these commands will become required to enable check/agent on
dynamic servers which will be created with check disabled.

This should be backported up to 2.4.

(cherry picked from commit c755efd5c64ad7327a6b763ea8025a820c5ca374)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/src/server.c b/src/server.c
index c7eb265..0ede127 100644
--- a/src/server.c
+++ b/src/server.c
@@ -4700,11 +4700,11 @@
 
 /* register cli keywords */
 static struct cli_kw_list cli_kws = {{ },{
-	{ { "disable", "agent",  NULL },         "disable agent  (DEPRECATED)             : disable agent checks (use 'set server' instead)",             cli_parse_disable_agent, NULL },
-	{ { "disable", "health",  NULL },        "disable health (DEPRECATED)             : disable health checks (use 'set server' instead)",            cli_parse_disable_health, NULL },
+	{ { "disable", "agent",  NULL },         "disable agent                           : disable agent checks",                                        cli_parse_disable_agent, NULL },
+	{ { "disable", "health",  NULL },        "disable health                          : disable health checks",                                       cli_parse_disable_health, NULL },
 	{ { "disable", "server",  NULL },        "disable server (DEPRECATED)             : disable a server for maintenance (use 'set server' instead)", cli_parse_disable_server, NULL },
-	{ { "enable", "agent",  NULL },          "enable agent   (DEPRECATED)             : enable agent checks (use 'set server' instead)",              cli_parse_enable_agent, NULL },
-	{ { "enable", "health",  NULL },         "enable health  (DEPRECATED)             : enable health checks (use 'set server' instead)",             cli_parse_enable_health, NULL },
+	{ { "enable", "agent",  NULL },          "enable agent                            : enable agent checks",                                         cli_parse_enable_agent, NULL },
+	{ { "enable", "health",  NULL },         "enable health                           : enable health checks",                                        cli_parse_enable_health, NULL },
 	{ { "enable", "server",  NULL },         "enable server  (DEPRECATED)             : enable a disabled server (use 'set server' instead)",         cli_parse_enable_server, NULL },
 	{ { "set", "maxconn", "server",  NULL }, "set maxconn server <bk>/<srv>           : change a server's maxconn setting",                           cli_parse_set_maxconn_server, NULL },
 	{ { "set", "server", NULL },             "set server <bk>/<srv> [opts]            : change a server's state, weight, address or ssl",             cli_parse_set_server },