check_icmp: double packet loss thresholds

[Al2Klimov]

... to get not instantly critical after 1 packet lost (20%), but after 2.

fixes #8606

[Al2Klimov]

Sorry, colleagues, but fixing this absolutely trivial one is ways faster that even talking about.

[julianbrost]

Also has to be adapted in the docs and the description string above (the latter ones are outdated (or maybe just wrong forever) already).

[Al2Klimov]

Why? 1 packet of 5 is 20%.

[julianbrost]

But it says 40% and 80% at the moment (and the timeouts are also wrong):

icinga2/itl/command-plugins.conf

Lines 2438 to 2445 in 875a4ef

	"-w" = {
	value = "$icmp_wrta$,$icmp_wpl$%"
	description = "warning threshold (currently 200.000ms,40%)"
	}
	"-c" = {
	value = "$icmp_crta$,$icmp_cpl$%"
	description = "critical threshold (currently 500.000ms,80%)"
	}

description string != PR description

[Al2Klimov]

Ah! This description string above...