Prompt for SSL key password when key is encrypted

Problem Statement/Rationale

Old tools used to ask for a password interactively. This is no longer the case with new tools.

Steps to Reproduce

Point mongodump to a client certificate that has an encrypted private key (PKCS#5 or PKCS#8)

Expected Results

The utility unwraps the private key and leaves no trace of the password neither in the process table or in a configuration file on the disk

Actual Results

The utility fails with the can't load client certificate: no password provided to decrypt private key error

Additional Notes

The customer can't use a configuration file or the --sslPEMKeyPassword command-line parameter due to compliance reasons