cryptsetup itself has no timeout as default from the beginning. So the
default timeout has been "0" from the beginning.
https://bugzilla.redhat.com/show_bug.cgi?id=949702
static bool opt_readonly = false;
static bool opt_verify = false;
static bool opt_discards = false;
static bool opt_readonly = false;
static bool opt_verify = false;
static bool opt_discards = false;
-static usec_t opt_timeout = DEFAULT_TIMEOUT_USEC;
+static usec_t opt_timeout = 0;
/* Options Debian's crypttab knows we don't:
/* Options Debian's crypttab knows we don't: