[monitoring-plugins] check_icmp: Add comment to config

[Lorenz Kästle]

 Module: monitoring-plugins
 Branch: master
 Commit: 6ac0580a10e5dcbda79ac8959a3b52f5217e877e
 Author: Lorenz Kästle <12514511+RincewindsHat at users.noreply.github.com>
   Date: Mon Jun 23 11:42:25 2025 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=6ac0580a

check_icmp: Add comment to config

---

 plugins-root/check_icmp.d/config.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/plugins-root/check_icmp.d/config.h b/plugins-root/check_icmp.d/config.h
index ab578ba5..c348bef5 100644
--- a/plugins-root/check_icmp.d/config.h
+++ b/plugins-root/check_icmp.d/config.h
@@ -96,7 +96,9 @@ typedef struct icmp_ping_data {
 #define DEFAULT_PING_DATA_SIZE (MIN_PING_DATA_SIZE + 44)
 
 /* 80 msec packet interval by default */
-#define DEFAULT_PKT_INTERVAL    80000
+// DEPRECATED, remove when removing the option
+#define DEFAULT_PKT_INTERVAL    80000 
+
 #define DEFAULT_TARGET_INTERVAL 0
 
 #define DEFAULT_WARN_RTA 200000