Clarify how fence_kdump works (#415) #1530

Job	Run time
select-dc-files	22s
validate (./DC-SLE-HA-all ./l10n/sleha/de-de/DC-SLE-HA-all)	28s
validate (./l10n/sleha/es-es/DC-SLE-HA-all)	18s
validate (./l10n/sleha/fr-fr/DC-SLE-HA-all)	22s
validate (./l10n/sleha/it-it/DC-SLE-HA-all)	26s
validate (./l10n/sleha/ja-jp/DC-SLE-HA-all)	28s
validate (./l10n/sleha/pt-br/DC-SLE-HA-all)	25s
validate (./l10n/sleha/zh-cn/DC-SLE-HA-all)	20s
validate (./l10n/sleha/zh-tw/DC-SLE-HA-all)	20s
build-html (DC-SLE-HA-administration)	2m 1s
build-html (DC-SLE-HA-geo-clustering)	1m 8s
build-html (DC-SLE-HA-geo-clustering-guide)	53s
build-html (DC-SLE-HA-installation)	51s
build-html (DC-SLE-HA-nfs-storage)	1m 7s
build-html (DC-SLE-HA-pacemaker-remote)	1m 5s
publish	17s
	10m 51s

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