This adds a function to parse multiple PEMs out of a single input.
This allows us to load certificates from a cacert.pem file without
need for preprocessing.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *