[server] If the level seed is not specified, the seed is always 0, random seed was expected

[NyaomiDEV]

As the title states, there's no random seed. This is a major issue for those who like to reset the world every week or so.

(btw seed 0 is the coolest seed I have ever seen :laughing: )

Also, what happens when using letters in level-seed field? like mamaMOOSE or other seeds

[MCMrARM]

Letter seeds should work.