face: increment link layer byte counters in EthernetFace

refs #1780

Change-Id: I27b9c19ef70b976c83f35bcd569dc7eb7f9802cd
tools: fixing bug of misleading lifetime and plural time unit for RIB in HTTP status page

refs #1854 #1855

Change-Id: Ifa112a88210e7882120f529f8c5c3f524d85aa03
tools: Enable "all-faces-prefix" option to register prefix for all face (on-demand and non-on-demand)

Change-Id: I6f2e894f2b46ba80c33c501623e47ca08a294795
Refs: #1861
tools: Process auto-registration for faces that existed prior to start of nfd-autoreg

Change-Id: I3848f1a20a0d816258759f95d427cf91cb3b9713
Refs: #1863