Bubfix:
==========
-A handful of lower-level classes (notably paramiko.message.Message and
paramiko.pkey.PKey) previously returned bytes objects from their
implementation of __str__, even under Python 3; and there was never any
__bytes__ method.
-Streamline some redundant (and costly) byte conversion calls in the packetizer
and the core SFTP module. This should lead to some SFTP speedups at the very least.
-Remove some unnecessary __repr__ calls when handling bytes-vs-str conversions.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
