Implement Base32 Hash hostnames, via the naming service. Names are of the form [52-characters].i2p, where the 52 characters are the Base32 representation of our 256-byte hash. The client requests a lookup of the hash via a brief I2CP session using new I2CP request/reply messages. The router looks up the leaseset for the hash to convert the hash to a dest. Convert the I2PTunnel 'preview' links to use Base32 hostnames as a demonstration.