[MacPorts] #59026: graphviz: the source URL is no longer valid

[MacPorts]

#59026: graphviz: the source URL is no longer valid
----------------------+------------------------
 Reporter:  yan12125  |      Owner:  ryandesign
     Type:  defect    |     Status:  assigned
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  graphviz
----------------------+------------------------
 {{{
 $ sudo port fetch --no-mirrors graphviz
 Password:
 --->  Fetching distfiles for graphviz
 --->  Attempting to fetch graphviz-2.40.1.tar.gz from
 http://www.graphviz.org/pub/graphviz/stable/SOURCES/
 Error: Failed to fetch graphviz: The requested URL returned error: 404 Not
 Found
 Error: See /opt/local/var/macports/logs/_Users_yen_Downloads_macports-
 ports_graphics_graphviz/graphviz/main.log for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port graphviz failed
 }}}

 From https://graphviz.gitlab.io/_pages/Download/Download_source.html, the
 source tarball is now at
 https://graphviz.gitlab.io/pub/graphviz/stable/SOURCES/graphviz.tar.gz
 (unversion :/).

 Related upstream ticket:
 https://gitlab.com/graphviz/graphviz.gitlab.io/issues/1

-- 
Ticket URL: <https://trac.macports.org/ticket/59026>
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