* Adds support for checksums in Proxmox_template.
* Implemented checksum verification
* Removed unintended captilization changes
* further fixing of unintended changes
* removed misspelling
* Final adjustementsto proxmox_template.py
* fixed typo
* fixed a typo in sha512
* add changelog fragment
* fixed type in choices for checksum_algortihm
* fixed file naming error and add relevant links to changelog
* Fix all unintentional refactorings
* refactoring changes removed
* renamed the function verify_checksum to fetch_and_verify for clarity
* Adjusted additions based on feedback
* Apply suggestions from code review
Co-authored-by: Felix Fontein <felix@fontein.de>
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Co-authored-by: Felix Fontein <felix@fontein.de>
Andrew Bowen