NAME
	crypt - encrypt a string

SYNOPSIS
	string crypt(string data, string key|int random)

DESCRIPTION
	This function encrypts the given `data' using the given encryption
	`key'. If the the second argument is given as an integer, the
	encryption is done with a random key.

EXAMPLE
	string pw,login_pw;
	/* crypt */
	pw=crypt(pw,0);

	/* check if login_pw is right */
	if(crypt(login_pw,pw)==pw) ok();