now limited to an arbitrary five deep, while parsing addresses with the
strip_excess_angle_brackets option enabled.
+PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
+ instead leave the unprompted TLS handshake in socket buffer for the
+ TLS library to consume.
+
+PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
+
Exim version 4.88
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