allow for searching by sha256 checksum

[aae42]

Describe the Enhancement:

I can search by md5 and sha1 checksums, i would like to be able to search by sha256 checksums

Describe the Need:

sha256 is a supported by modern artifactory, we should be able to search by it

Current Alternative

an md5 or sha1 hash, annoying to use if you don't have it

Can We Help You Implement This?:

yes, pull the simple request