Add Zabbix completions (#9647)

Add Zabbix completions

(cherry picked from commit 9bd1dc14e5)

share/completions/zabbix_proxy.fish

@@ -0,0 +1,60 @@
+set -l runtime config_cache_reload \
+    snmp_cache_reload \
+    housekeeper_execute \
+    diaginfo \
+    diaginfo= \
+    log_level_increase \
+    log_level_increase= \
+    log_level_decrease \
+    log_level_decrease=
+
+
+function __fish_string_in_command -a ch
+    string match -rq $ch (commandline)
+end
+
+function __fish_prepend -a prefix
+    set -l log_target "configuration syncer" \
+    "data sender" \
+    discoverer \
+    "history syncer" \
+    housekeeper \
+    "http poller" \
+    "icmp pinger"\
+    "ipmi manager" \
+    "ipmi poller" \
+    "java poller" \
+    poller \
+    self-monitoring \
+    "snmp trapper" \
+    "task manager" \
+    trapper \
+    "unreachable poller" \
+    "vmware collector"
+
+    if string match -rq 'log_level_(in|de)crease' $prefix
+        set var $log_target
+    else if string match -rq 'diaginfo' $prefix
+        set var historycache preprocessing
+    end
+
+    for i in $var
+        echo $prefix="$i"
+    end
+end
+
+
+# General
+complete -c zabbix_proxy -s c -l config -d "Use an alternate config-file."
+complete -c zabbix_proxy -f -s f -l foreground -d "Run Zabbix agent in foreground."
+complete -c zabbix_proxy -f -s R -l runtime-control -a "$runtime" -d "Perform administrative functions."
+complete -c zabbix_proxy -f -s h -l help -d "Display this help and exit."
+complete -c zabbix_proxy -f -s V -l version -d "Output version information and exit."
+
+# Logs
+complete -c zabbix_proxy -r -f -s R -l runtime-control -n "__fish_string_in_command log_level_increase" -a "(__fish_prepend log_level_increase)"
+complete -c zabbix_proxy -r -f -s R -l runtime-control -n "__fish_string_in_command log_level_decrease" -a "(__fish_prepend log_level_decrease)"
+
+# Diag info
+complete -c zabbix_proxy -r -f -s R -l runtime-control -n "__fish_string_in_command diaginfo" -a "(__fish_prepend diaginfo)"
+