Brian Foshee 025459f901 Make ServerConn safe for concurrent use ...

ServerConn's textproto.Conn is safe for concurrent access. This adds
calls to StartResponse() and EndResponse() to put that to use wherever
Cmd() is called.
https://golang.org/pkg/net/textproto/#Conn.Cmd

Additionally, this adds a sync.Mutex on ServerConn to provide
concurrency protection for data commands such as STOR and RETR that need
to run through synchronous steps.

2016-03-03 14:30:28 -05:00

5.0 KiB

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