[MacPorts] #50775: haproxy: update to 1.6.3

[MacPorts]

#50775: haproxy: update to 1.6.3
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  Reporter:  relgames@…  |      Owner:  sam@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  haproxy     |
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Comment (by relgames@…):

 Replying to [comment:1 mf2k@…]:
 > A comment about the patch. The rmd160 and sha256 checksums need to stay.
 See the [https://guide.macports.org/#reference.phases.checksum guide
 section about checksums]. md5 is considered insecure but can be kept if
 upstream publishes it.

 HAproxy download page has only MD5 hashes
 http://www.haproxy.org/download/1.6/src/
 Meaning, rmd160 and sha256 will be calculated by me and not taken from the
 upstream.

 If MD5 is insecure, what makes you think I can't be affected? Hashes
 calculated by me can't be validated by checking upstream download page,
 you'll need to either trust me or re-calculate hashes yourself.
 Do you still think I should do it?..

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Ticket URL: <https://trac.macports.org/ticket/50775#comment:2>
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