ssh: correct parse_cert_times case for hex "to" time

[emaste]

Summary

This appeared to be a copy-paste error from the "from" time case above.

Test Plan

Reported by:    Coverity Scan
CID:            1500407
Sponsored by:   The FreeBSD Foundation

[emaste]

Coverity's report:

 *** CID 1500407:  Incorrect expression  (COPY_PASTE_ERROR)
/crypto/openssh/ssh-keygen.c: 1978 in parse_cert_times()
1972                    fatal("Invalid from time \"%s\"", from);
1973     
1974            if (*to == '-' || *to == '+')
1975                    cert_valid_to = parse_relative_time(to, now);
1976            else if (strcmp(to, "forever") == 0)
1977                    cert_valid_to = ~(u_int64_t)0;
>>>     CID 1500407:  Incorrect expression  (COPY_PASTE_ERROR)
>>>     "from" in "strncmp(from, "0x", 2UL)" looks like a copy-paste error.
1978            else if (strncmp(from, "0x", 2) == 0)
1979                    parse_hex_u64(to, &cert_valid_to);
1980            else if (parse_absolute_time(to, &cert_valid_to) != 0)
1981                    fatal("Invalid to time \"%s\"", to);
1982     
1983            if (cert_valid_to <= cert_valid_from)

[emaste]

For reference, issue was introduced in OpenSSH-portable ec1ddb72a146fd66d18df9cd423517453a5d8044, which references OpenBSD-Commit-ID: 454db1cdffa9fa346aea5211223a2ce0588dfe13