conn: Remove assert on new listener connection when retrying
Opening a new listener connection can fail in many ways like a bind() permission denied on a low port for instance.
And thus, we should expect to handle an error when creating a new one instead of assert() on it.
To hit the removed assert:
ORPort 80 KeepBindCapabilities 0
Start tor. Then edit torrc:
HUP tor and the assert is hit.
Signed-off-by: David Goulet email@example.com