Convert PFX certficates to PEM format

Convert a certificate in PFX format to PEM format for use with integrator.io.

1. Open the text of the PFX certficate, and copy all data from -----BEGIN PRIVATE KEY----- to -----END PRIVATE KEY-----.
2. Paste that text into a file, and change the filename extension to .key.
3. Copy the rest of the certificate information, paste it into another text file, and change the filename extension to .pem.
4. Use the .key file in the SSL client key field of the HTTP connection and the .pem file in the SSL certificate field.
5. Enter the passphrase in the SSL passphrase field.