[Bug 230393] security/base-audit: Use anticongestion function if available

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230393

            Bug ID: 230393
           Summary: security/base-audit: Use anticongestion function if
                    available
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: yasu at utahime.org
                CC: 000.fbsd at quip.cz
             Flags: maintainer-feedback?(000.fbsd at quip.cz)
                CC: 000.fbsd at quip.cz

Created attachment 195915
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=195915&action=edit
patch file

* Use anticongestion function if available. Commit message of base r316342 says
as following.
  ----------------------------------------------------------------------
  Consolidate random sleeps in periodic scripts

  Multiple periodic scripts sleep for a random amount of time in order to
  mitigate the thundering herd problem. This is bad, because the sum of
  multiple uniformly distributed random variables approaches a normal
  distribution, so the problem isn't mitigated as effectively as it would be
  with a single sleep.

  This change creates a single configurable anticongestion sleep. periodic
  will only sleep if at least one script requires it, and it will never sleep
  more than once per invocation. It also won't sleep if periodic was run
  interactively, fixing an unrelated longstanding bug.
  ----------------------------------------------------------------------
* Bump PORTREVISION.

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