Update devel/fossil to 2.16

Changes for Version 2.16 (2021-07-02)
  *  Security: Fix the client-side TLS so that it verifies that the
    server hostname matches its certificate.
  *  The default "ssh" command on Windows is changed to "ssh" instead of the
    legacy "plink", as ssh is now generally available on Windows systems.
    Installations that still need to use the legacy "plink" can make that
    happen by running: 'fossil set ssh-command "plink -ssh" --global'.
  *  Added the fossil patch command.
  *  The fossil ui command is enhanced in multiple ways:
    * The REPOSITORY argument can be the name of a check-out directory.
    * If the REPOSITORY argument is prefixed by "HOST:" or "USER@HOST:"
      then the ui is run on the remote machine and tunnelled back to the local
      machine using ssh.  (The latest version of fossil must be installed on
      both the local and the remote for this to work correctly.)
    * The new --nobrowser and --fossilcmd options is provided.
  *  The /brlist web page allows the user to select multiple branches to be
    displayed together in a single timeline.
  *  The Forum provides a hyperlink on the author of each post that goes to a
    timeline of recent posts by that same author.
  *  Added the "fossil bisect run" command for improved automation of bisects.
  *  The fossil merge command now does a better job merging branches where files
    have been renamed between the current branch and the branch being merged.
  *  The fossil open command allows the repository file to be inside the working
    directory without requiring the --force flag.
  *  The /wikiedit and /wikinew pages now default to markdown format.
  *  The /login page now links to a user's forum post timeline if the repository
    has forum posts.
  *  Tags may now be propagated for forum posts, wiki pages, and technotes.
    The tag command can now manipulate and list such tags.
  *  Login-Groups are now shown on the repository list of the "fossil all ui"
    command.
  *  Administrators can configure email alerts to expire a specific number of
    days (ex: 365) after the last user contact with the Fossil server. This
    prevents alert emails being sent to abandoned email accounts forever.
  *  SQL that defines database objects for tickets now can DROP a VIEW or an
    INDEX provided that its name starts with 'ticket' or 'fx_'.
  *  Update the built-in SQLite to version 3.36.0.
  *  Numerous other minor enhancements.

(js)