NEO 1.10

* tag 'v1.10': (55 commits)
  Release version 1.10
  Maximize resiliency by taking into account the topology of storage nodes
  storage: also commit updated cell TID at each replicated chunk of 'obj' records
  storage: skip useless work when unlocking transactions
  qa: flush logs at the end of each test when -L is not used
  qa: add a log in case that a mysterious bug happens again
  storage: clarify log about data deletion of discarded cells
  debug: new example to run the profiler for 1 minute
  mysql: fix replication of big oids (> 16M)
  tests/cluster: speedup waiting a bit
  protocol: update packet docstrings
  Bump protocol version
  protocol: a single byte is more than enough to encode enums
  protocol: small cleanup in packet registration
  Optimize resumption of replication by starting from a greater TID
  importer: update comment about a workaround for ZODB3
  Micro-optimization of p64/u64
  qa: add a log in testBackupNodeLost for easier debugging
  Document that the bug when checking replicas may also cause the master to crash
  storage: stop logging 'Abort TXN' for txn that have been locked
  storage: split _migrate2() for reusable _alterTable()
  qa: new testStorageUpgrade
  qa: update testStorageUpgrade data for what is not automatically upgraded
  qa: original data for the future testStorageUpgrade
  sqlite: fix indexes of upgraded db
  importer: fix NameError when recovering during tpc_finish
  fixup! importer: fetch and process the data to import in a separate process
  Serialize empty transaction extension with an empty string
  client: fix partial import from a source storage
  qa: give a title to subprocesses of functional tests
  importer: give a title to the 'import' and 'writeback' subprocesses
  importer: fetch and process the data to import in a separate process
  importer: new option to write back new transactions to the source database
  importer: log when the transaction index for FileStorage DB is built
  importer: open imported zodb in read-only whenever possible
  fixup! mysql: fix remaining places where a server disconnection was not catched
  fixup! storage: speed up replication by sending bigger network packets
  mysql: do not full-scan for duplicates of big oids if deduplication is disabled
  mysql: fix remaining places where a server disconnection was not catched
  fixup! Add support for custom compression levels
  importer: reenable compression by default
  qa: review testImporter
  qa: remove a few uses of 'chr'
  Fix a few issues with ZODB5
  importer: small code cleanup in speedupFileStorageTxnLookup patch
  importer: do not trigger speedupFileStorageTxnLookup uselessly
  Add support for custom compression levels
  setup: update MANIFEST.in
  importer: do not checksum data twice
  client: store uncompressed if compressed size is equal
  fixup! master: automatically discard feeding cells that get out-of-date
  master: automatically discard feeding cells that get out-of-date
  qa: remove useless indentation in testSafeTweak
  bench: new option to mesure ZEO perfs in matrix test
  bench: reduce number of partitions in matrix test
  storage: fix replication of creation undone