RefreshResource

a rough mod hacked together in one day, might break things, proceed with caution

Usage:

/reloadresource <url> <sha1 hash>      
   example:
       /reloadresource "http://path.to/your/resoursepack.zip" "936B7BBB28B6FC19C7D207D141426CF923C17EDB"

hash must be in uppercase

send corresponding resourcepack to all players on server

best when used with external program that can calculate hash and pump commands to server via RCON or by other means

/resend

send last resourcepack sent by /reloadresource to the player executed it