Get the original sources (normally) as a compressed tarball
      (foo.tar.gz or
      ) and
      copy it into foo.tar.bz2DISTDIR.  Always use
      mainstream sources when and where
      possible.
Set the variable
      MASTER_SITES to reflect where the original
      tarball resides.  Shorthand definitions exist
      for most mainstream sites in bsd.sites.mk.
      Please use these sites—and the associated
      definitions—if at all possible, to help avoid the problem
      of having the same information repeated over again many times in
      the source base.  As these sites tend to change over time, this
      becomes a maintenance nightmare for everyone involved.  See
      Section 5.4.2, “MASTER_SITES” for details.
If there is no FTP/HTTP site that is well-connected to the net, or can only find sites that have irritatingly non-standard formats, put a copy on a reliable FTP or HTTP server (for example, a home page).
If a convenient and reliable place to put the distfile
      cannot be found, we can “house” it ourselves on
      ftp.FreeBSD.org; however, this is the
      least-preferred solution.  The distfile must be placed into
      ~/public_distfiles/ of someone's
      freefall account.  Ask the person who
      commits the port to do this.  This person will also set
      MASTER_SITES to
      LOCAL/
      where username is
      their FreeBSD cluster login.username
If the port's distfile changes all the time without any
      kind of version update by the author, consider putting the
      distfile on a home page and listing it as the first
      MASTER_SITES.  Try to talk the
      port author out of doing this; it really does help to establish
      some kind of source code control.  Hosting a specific version
      will prevent users from getting
      checksum mismatch errors, and also reduce
      the workload of maintainers of our FTP site.  Also, if there is
      only one master site for the port, it is recommended to
      house a backup on a home page and list it as the second
      MASTER_SITES.
If the port requires additional patches that are
      available on the Internet, fetch them too and put them in
      DISTDIR.  Do not worry if they come from a
      site other than where the main source tarball comes, we have a
      way to handle these situations (see the description of PATCHFILES below).
All FreeBSD documents are available for download at https://download.freebsd.org/ftp/doc/
Questions that are not answered by the
    documentation may be
    sent to <freebsd-questions@FreeBSD.org>.
    Send questions about this document to <freebsd-doc@FreeBSD.org>.