IOClient: Provided ioflags from session to READ io command created by read_file.
Recovery: Added to merge statistics 'local_remove_old*' counters that contains information about keys which were removed without copying because they contain old data of keys.
IOClient: provided cflags in READ io command created by read_file.
Merge pull request #378 from shaitan/lts

IOClient: Provided ioflags from session to READ io command created by read_file. (LTS)