[Dev] new plan for managing 'icu' and 'poppler' dependent packages

[bill-auger]

as most people know, the dreaded icu-pocalypse has been a
recurring bother for the parabola devs and user alike - gnutoo
and eli have cooked up a new plan for an 'icu-parabola' package,
to smooth the transition from one version of 'icu' to the next -
the main advantage of this is that, in the future, people will
no longer be blocked from upgrading, during the transition
period - if it works out well, we will do the same for 'poppler'
- denis will send an email later to explain more, once the
logistics are nailed down

to go along with this, i have completed the task that freemor
started on the bug tracker, to make tracking and managing the
many rebuilds easier to grok - there are 6 special redmine
tickets, with each dependent package as sub-tasks - we will be
able to keep those 6 open always; and simply toggle each
individual package tickets 'open' and 'fixed' as needed - the
"STICKY" tag should make them easy to locate when needed

https://labs.parabola.nu/issues/2723 [STICKY][poppler]: and friends (armv7h)
https://labs.parabola.nu/issues/2720 [STICKY][poppler]: and friends (i686)
https://labs.parabola.nu/issues/2546 [STICKY][poppler]: and friends (x86_64)
https://labs.parabola.nu/issues/2071 [STICKY][icu] and friends (armv7h)
https://labs.parabola.nu/issues/2727 [STICKY][icu] and friends (i686)
https://labs.parabola.nu/issues/2047 [STICKY][icu] and friends (x86_64)