subclass system libraries so we can give better diagnostic eventually

move to use v5.36;
tested by me over the last few weeks, and tb@
also fixed a "manual install" bug properly reported by tb@

aside that there should be *no functional change*.
If you see any message

move to use v5.36;
tested by me over the last few weeks, and tb@
also fixed a "manual install" bug properly reported by tb@

aside that there should be *no functional change*.
If you see any message like "hey, the number of params is wrong"
it is a fringe case I didn't run into and should be easy to fix.

show more ...

document base method

we already have a comparison function for libobjects, so move it up to
the best class, and sort bad libraries in dependency solving accordingly

add glue to be able to ask "give me the highest number shared library with
that stem". needed later for new fancy stuff in check-lib-depends
okay sthen@

remove $_ usage that warns under perl 5.18

handle failures from ports tree with more care.
this does avoid infinite loops in case of wrong plists.
necessary since print-plist-with-depends CAN fail...

initial scaffolding for @rcscript: for now, acts like normal files,
but allow absolute pathnames (treat that as an implicit @cwd).

move compare into LibSpec, it's not so specific to Signature after all

allow say and errsay to work without parameters, as it's ways common.
create verbose_system up in state, because it makes sense without verbose.

whitespace cleanup

let build libspec match as they should.
namely, if a shared lib exists, then a static library should not match
if the version number is not okay.
problem noticed by sthen@, okay sthen@

ui changes: go thru a state object for most printouts

whitespace fixes

more tweaks so that it can be extended and used during ports builds

refactor LibSpec to be able to reuse it for library matches during build:
- use double dispatch to match static libs
- prepare for less strict dependencies if need be

clean up the ProgressMeter code, create a specific class if a Term
is around.
start using stuff from termcap, specifically, cleareol, and move to hp.
use the full line when we can, cram 100% if we ca

clean up the ProgressMeter code, create a specific class if a Term
is around.
start using stuff from termcap, specifically, cleareol, and move to hp.
use the full line when we can, cram 100% if we can.
(this should flicker much less on slow terminals).

clean-up the install-and-progress bits to be in progressmeter, this removes
some code.

have pkg_create follow the same pattern as the others, with a state.
This allows us to unify error messages a bit.

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extra indirection: no match gives a reason why, so we can rebuild
report_problems to actually say what's wrong...

add code to unify spec and names as LibraryObject, plus a repository and
match/lookup functions.

simplify caching: return $cached->{$_} //= new_value;
remove stats
cache LibSpec as well (1000 c.53.0 !)

move generic code to handle libspec in a new file, to clean up stuff