add fibrechannel to default list in read me; host -> fc_host to avoid name collision

Signed-off-by: mhiles <hiles@hpe.com>

README.md

@@ -37,6 +37,7 @@ diskstats | Exposes disk I/O statistics. | Darwin, Linux, OpenBSD
 edac | Exposes error detection and correction statistics. | Linux
 entropy | Exposes available entropy. | Linux
 exec | Exposes execution statistics. | Dragonfly, FreeBSD
+fibrechannel | Exposes fibre channel information and statistics from `/sys/class/fc_host/`. | Linux
 filefd | Exposes file descriptor statistics from `/proc/sys/fs/file-nr`. | Linux
 filesystem | Exposes filesystem statistics, such as disk space used. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
 hwmon | Expose hardware monitoring and sensor data from `/sys/class/hwmon/`. | Linux

collector/fibrechannel_linux.go

@@ -87,7 +87,7 @@ func NewFibreChannelCollector(logger log.Logger) (Collector, error) {
 		i.metricDescs[metricName] = prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, i.subsystem, metricName),
 			description,
-			[]string{"host"},
+			[]string{"fc_host"},
 			nil,
 		)
 	}