Update dehydrated to version 0.7.1.

Pkgsrc changes :
 * Project has a new home : updated distfile URL and homepage ;
 * Updated PLIST following the removal of a file ;
 * Updated checksums.

Upstream changes :
 * version 0.7.0 :
   - Support for external account bindings
   - Special support for ZeroSSL
   - Support presets for some CAs instead of requiring URLs
   - Allow requesting preferred chain (--preferred-chain)
   - Added method to show CAs current terms of service (--display-terms)
   - Allow setting path to domains.txt using cli arguments (--domains-txt)
   - Added new cli command --cleanupdelete which deletes old files instead of
     archiving them
   - No more silent failures on broken hook-scripts
   - Better error-handling with KEEP_GOING enabled
   - Check actual order status instead of assuming it's valid
   - Don't include keyAuthorization in challenge validation (RFC compliance)
   - Using EC secp384r1 as default certificate type
   - Use JSON.sh to parse JSON
   - Use account URL instead of account ID (RFC compliance)
   - Dehydrated now has a new home: https://github.com/dehydrated-io/dehydrated
   - Added OCSP_FETCH and OCSP_DAYS to per-certificate configurable options
   - Cleanup now also removes dangling symlinks

 * version 0.7.1 :
   - --force no longer forces domain name revalidation by default, a new
     argument --force-validation has been added for that
   - Added support for EC secp521r1 algorithm (works with e.g. zerossl)
   - EC PARAMETERS are no longer written to privkey.pem (didn't seem necessary
     and was causing issues with various software)
   - Requests resulting in badNonce errors are now automatically retried (fixes
     operation with LE staging servers)
   - Deprecated egrep usage has been removed
   - Implemented EC for account keys
   - Domain list now also read from domains.txt.d subdirectory (behaviour might
     change, see docs)
   - Implemented RFC 8738 (validating/signing certificates for IP addresses
     instead of domain names) support (this will not work with most
     public CAs, if any!)


(nils)