Add support for encryption -- using mcrypt or gpg where applicable

Packages describing “crypt” as local USE flag

Package “crypt” Flag Description
dev-libs/totem-pl-parser Support AmazonAMZ decoding with dev-libs/libgcrypt
net-analyzer/nsca Build support for crypted communication with nsca, through dev-libs/libmcrypt. It's recommended not to disable this flag unless all the communication will be handled in an absolutely safe environment.
dev-libs/libgdata Use app-crypt/gcr for keeping tokens and passwords in non-pageable memory for improved security
app-text/pastebinit Install pbputs for gpg-encrypted pastes
net-mail/notmuch Support decryption and verification of PGP/MIME messages and in Emacs UIencryption; support also S/MIME signature verification since version 0.22
sys-libs/glibc build and install libcrypt and crypt.h
kde-plasma/plasma-meta Pull in kde-plasma/plasma-vault for encrypted vaults integration
net-im/gajim End to end encryption and GPG encryption
net-irc/limnoria Enables user authentication with GPG
net-irc/quassel Support core->network per-channel and per-query blowfish encryption via app-crypt/qca SLOT 2.
sys-power/suspend Allows suspend and resume from encrypted disk

All packages providing a “crypt” USE flag (42)