bootstrap: add /dnsaddr nodes, remove half of /ip4,/ip6 nodes

License: MIT
Signed-off-by: Lars Gierth <[email protected]>

Ipfs release 0.4.10

Ipfs 0.4.10 release candidate 1

Ipfs version 0.4.9

Ipfs 0.4.9 release candidate 2

Ipfs 0.4.9 release candidate 1

Ipfs version 0.4.8

Ipfs 0.4.8 release candidate 1

Ipfs version 0.4.7

Ipfs 0.4.7 release candidate 1