Get the server's history of read bytes, or null if the descriptor
does not contain a bandwidth history; older Tor versions included
bandwidth histories in their server descriptors
(ServerDescriptor.getReadHistory()).
Get the server's history of read bytes, or null if the descriptor
does not contain a bandwidth history; current Tor versions include
bandwidth histories in their extra-info descriptors
(ExtraInfoDescriptor.getReadHistory()), not in their server
descriptors.
Get the server's history of written bytes, or null if the
descriptor does not contain a bandwidth history; older Tor versions
included bandwidth histories in their server descriptors
(ServerDescriptor.getWriteHistory()).
Get the server's history of written bytes, or null if the
descriptor does not contain a bandwidth history; current Tor versions
include bandwidth histories in their extra-info descriptors
(ExtraInfoDescriptor.getWriteHistory()), not in their server
descriptors.