clean output.c a little

Signed-off-by: Andy Green <andy.green@linaro.org>
truncated send keep and grow truncation buffer

Also change from looking at wsi->truncated_send_malloc to see if we are in the middle of
dealing with a truncated send to looking for nonzero wsi->truncated_send_len

Signed-off-by: Andy Green <andy.green@linaro.org>
ssl add SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER to server and client

gaby64 at githib found this option is necessary when using SSL with the
truncated send support

Signed-off-by: Andy Green <andy.green@linaro.org>
ssl output handle want read write

Signed-off-by: Andy Green <andy.green@linaro.org>