New scripts for checking and fixing copyright notices so they include
the current year.  E.g., "scripts/fixCopyrights" will update the notices
in all files that have been modified.
Renamed Buffer::getTotalLength to Buffer::size; same for
Buffer::Iterator::getTotalLength.  This conforms to standard C++
practice for such methods.
Changed Buffer::append to Buffer::appendExternal to make the behavior more obvious.
Fixed bug in TcpTransport.cc where it could exceed the (unadvertised) limit
on the number of iovecs in a single outgoing message.
Fixed segementation fault in Buffer (call getRange with zero-length range starting exactly at the end of the buffer).
Modified InfRcTransport to use zero-copy for sending results (previously,
it was used only for requests). This improved large-object read bandwidth
from 2.2 GB/s to 2.7 GB/s.
Add Buffer check to handle 0-byte appends.
Add checks to Object/IndexServerControl; Add ServerControl RPC.

ObjectServerControl and IndexServerControl now ensure on the server-side that
the responding server owns the object or index in question.  If not, the server
responds with STATUS_UNKNOWN_TABLET/INDEXLET as appropriate.  Both RPC
implementations are unified under a ServerControl RPC.  The ServerControl RPC
may also be used as a building block for any future ServerControlAll RPC.