sys-apps/portage: Bump to version 2.3.82

sys-apps/portage: Bump to version 2.3.82

 #310009 emerge: Show package USE in conflict messages
 #680456 display relevant FEATURES when unshare fails
 #693454 emerge-webrsync: support gentoo-YYYYMMDD snapshots
 #702146 emerge: drop FEATURES=distcc-pump support
 #702970 emerge-webrsync: enable xz snapshots for tarsync

Bug: https://bugs.gentoo.org/701268
Bug: https://bugs.gentoo.org/310009
Bug: https://bugs.gentoo.org/680456
Bug: https://bugs.gentoo.org/693454
Bug: https://bugs.gentoo.org/702146
Bug: https://bugs.gentoo.org/702970
Package-Manager: Portage-2.3.82, Repoman-2.3.20
Signed-off-by: Zac Medico <zmedico@gentoo.org>