Allow strings in params to be of zero length
Allow strings in params to be of zero length

Sometimes it is useful to be able to pass NULL/zero length strings

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10152)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl