gen-crl should use -crldays not -days

[TinCanTech]

This does not currently effect eayrsa because CRL days is configured via openssl-easyrsa.cnf. However, the SSL parameter -days is incorrectly used here:

easy-rsa/easyrsa3/easyrsa

Lines 3169 to 3172 in 03e4829

	easyrsa_openssl ca -utf8 -gencrl -out "$out_file_tmp" \
	${EASYRSA_CRL_DAYS:+ -days "$EASYRSA_CRL_DAYS"} \
	${EASYRSA_PASSIN:+ -passin "$EASYRSA_PASSIN"} || \
	die "CRL Generation failed."

SSL -days only configures certificate expiry. OpenSSL Manual

[TinCanTech]

Bugfix: 7313fb0