[Dev] redmine update

[bill-auger]

as some may have noticed, ive tweaked the redmine site a bit this week
and brought it's code up to date with the latest upstream release - it
was a number of years worth of commits added so watch for problems

redmine is now forked onto parabola git server if anyone want to fiddle
with it - it was apparently running from an unstable git branch on
github that no longer exists - it is now running from the 'parabola'
branch; which is the latest tagged release '3.4-stable' with the
parabola customizations rebased onto it

it seems that normal users had a bit too much privilege such as the
ability to re-assign issues - i went through the permissions matrix
thoroughly and set all groups to something reasonable - "hacker" and
"community" have full permissions on all trackers and normal users now
are able only to open and close their own issues and comment on others

one other small functional change is that only the "assignee" is able
to mark an issue as "fixed" - but still any "hacker" or "community" can
mark them as "invalid"

i also added handy "my issues" and "all recent issues" links to the
navbar and a more informative landing page to replace the less than
informative completely empty one that was there (or not there)

we may want to discuss the re-assigning of roles "hacker" and
"community" - these are currently nearly the same set but not exactly;
and many in the set are not officially active according to hackers.git
- maybe inactive former devs should be moved to community even if the
permissions are currently the same - one very practical reason to do
that would be so that the issues assignment select options would not be
so un-necessarily populous - have different permissions sets may be
something else to discuss

finally, the rails log file is 6.5 GB - it may be wise to delete this -
should it be backed up first?
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