[RTEMS Project] #3323: mhttpd's http etag can result in invalid caching in a browser.

[RTEMS trac]

#3323: mhttpd's http etag can result in invalid caching in a browser.
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  Reporter:  Chris Johns  |      Owner:  Chris Johns
      Type:  defect       |     Status:  assigned
  Priority:  normal       |  Milestone:  5.1
 Component:  lib          |    Version:  5
  Severity:  normal       |   Keywords:
Blocked By:               |   Blocking:
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 The mhttp's http etag uses the mtime and file length and this can cause
 subtle issues if a target has no RTC or it is incorrect and files are
 being copied without preserving the mtime or changes happen that do not
 change the length.

 The `cp` and `untar` code do not update a file's time.

 Add support for an etag callback so a user can manage the tag, ie MD5 or
 something similar.

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Ticket URL: <http://devel.rtems.org/ticket/3323>
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