net-mgmt/check_nwc_health: Update to 7.10.1.8. Changes since 7.10.1.5:

• fix a bug in Cisco memory, for Cisco emulation mode of Bel VPN Gate
• fix redundant argument in sprintf
• fix operstatus in linuxlocal
• fix a bug in verbose mode if --nosensors is used

Reported by: portscout
Approved by: matthew (mentor, implicit)