strings to a single string. Quote `errors-file-name'.
(pgg-pgp-encrypt-region, pgg-pgp-decrypt-region, pgg-pgp-sign-region)
(pgg-pgp-verify-region, pgg-pgp-insert-key, pgg-pgp-snarf-keys-region):
Adjust calls. Use `shell-quote-argument'.
(pgg-pgp-encrypt-symmetric-region, pgg-pgp-encrypt-symmetric)
(pgg-pgp-encrypt, pgg-pgp-decrypt-region, pgg-pgp-decrypt)
(pgg-pgp-sign-region, pgg-pgp-sign): Add optional 'passphrase'
argument to all these routines, so the passphrase can be managed
externally and passed in to the system.
(pgg-pgp-decrypt-region, pgg-pgp-sign-region): Use new name for
pgg-add-passphrase-to-cache function.