Fix #1936 - Add new ACME validation methods onion-csr-01 and bp-nodeid-00

[bwbroersma]

• Fix Add new ACME validation methods onion-csr-01 and bp-nodeid-00 #1936

Automated with a bash one-liner:

$ sed -i -rz 's/(\nACME_VALIDATION_METHODS = \{\n)[^}]+(\})/\1'"$(curl -sSf https://www.iana.org/assignments/acme/acme-validation-methods.csv|awk -F, 'NR>1&&$3=="Y"{if(!c[$1])printf "    \"%s\",\\n",$1;c[$1]++}')"'\2/' checks/caa/parser.py

I noticed the duplicate http-01 and tls-alpn-01 got removed, that was an error and serves no mapping purpose right @mxsasha?