The uncompressed threat entries in hash format. Hashes can be anywhere
from 4 to 32 bytes in size. A large majority are 4 bytes, but some
hashes are lengthened if they collide with the hash of a popular URI.
Used for sending ThreatEntryAdditons to clients that do not support
compression, or when sending non-4-byte hashes to clients that do
support compression.
The hashes, in binary format, concatenated into one long
string. Hashes are sorted in lexicographic order. For JSON API
users, hashes are base64-encoded.
