Revert "Docs(audit): fix flag for dgraph audit decrypt"

[rarvikar]

Reverts #288

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[joshua-goldstein]

There are at least two kinds of encryption in Dgraph

• Encryption at rest
• Audit log encryption

Unfortunately in the code base it is not clear which packages are responsible for which. The code in ee/audit/run_ee.go is responsible for parsing the flags related to audit log encryption. To enable audit log encryption, one runs

dgraph alpha --audit output=audit-log-dir;compress=true;encrypt-file=/path/to/encrypt/key/file

and to decrypt audit logs, one runs

dgraph audit decrypt --encryption_key_file=/path/encrypt/key/file --in /path/to/encrypted/log/file --out /path/to/output/file

See docs here (currently incorrect) The code where the flag is parsed is here.

For encryption at rest, one uses

dgraph alpha --encryption key-file="./enc_key_file" --my="localhost:7080" --zero="localhost:5080"

See docs here.

[joshua-goldstein]

Closing because this was based on a misunderstanding @rarvikar @MichelDiz