ports-mgmt/pkg: update to 2.1.0

/!\ Committer visible changes /!\
in poudriere and system using pkg add, pkg will verify that provides
requires (including for shlibs) are satisfied, which meaning it can now
stop stating a missing required dependency is missing, which up to now
where happening unnoticed!

Major changes:

* pkg add: now supports shlibs and regular provides/requires
* info -r and -d now shows shlibs and regular provides/requires
* new --script-no-exec: which makes pkg dies if a script attempt to exec an
  external binary

Other changes:

* improve VITAL flag handling
* upgrade libcurl to latest version
* fix pkg bootstrap -y
* libpkg: allow non interactive way to set IGNORE\_OSVERSION
* lots of internal bug fixes
* fix progress

PR:		285325
Exp-run:	antoine