Just as a silent reader - you are doing the correct thing (chasing the libnfs 1.6.3 issue instead of the 1.3 which we don't really care about as it is fixed in 1.6.3). *keeps silent again cause*
AppleTV4/iPhone/iPod/iPad: HowTo find debug logs and everything else which the devs like so much: click here
HowTo setup NFS for Kodi: NFS(wiki)
HowTo configure avahi (zeroconf): Avahi_Zeroconf(wiki)
READ THE IOS FAQ!: iOS FAQ(wiki)