Name: crypt - encrypt a string

Syntax:
	string crypt(string str, string seed);

Description:
	The crypt efun is used to enrypt the string 'str' using two characters
	from 'seed' as a seed. If 'seed' is 0, then a random seed is used.

	This function is used by the password mechanism.

Return value:
	The result of the encryption is returned. Its first two characters are
	the same as the seed.

Example:
	string name;
	name=crypt(this_player()->query_name(), "XY");

See also: helpdir/password