Clarify how fence_kdump works (#415) #1533

Job	Run time
select-dc-files	19s
validate (./DC-SLE-HA-all ./l10n/de-de/DC-SLE-HA-all)	23s
validate (./l10n/es-es/DC-SLE-HA-all)	20s
validate (./l10n/fr-fr/DC-SLE-HA-all)	21s
validate (./l10n/it-it/DC-SLE-HA-all)	30s
validate (./l10n/ja-jp/DC-SLE-HA-all)	19s
validate (./l10n/pt-br/DC-SLE-HA-all)	20s
validate (./l10n/zh-cn/DC-SLE-HA-all)	19s
validate (./l10n/zh-tw/DC-SLE-HA-all)	22s
build-html (DC-SLE-HA-geo-guide)	1m 12s
build-html (DC-SLE-HA-geo-quick)	50s
build-html (DC-SLE-HA-guide)	1m 19s
build-html (DC-SLE-HA-install-quick)	51s
build-html (DC-SLE-HA-nfs-quick)	49s
build-html (DC-SLE-HA-pmremote-quick)	1m 8s
publish	17s
	9m 39s

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