New upstream release 4.9.2
    
    Changes:
        Do not use getprotobynumber() for protocol name resolution.  Do not do
          any protocol name resolution if -n is specified.
        Improve errors detection in the test scripts.
        Fix a segfault with OpenSSL 1.1 and improve OpenSSL usage.
        Clean up IS-IS printing.
        Fix buffer overflow vulnerabilities:
          CVE-2017-11543 (SLIP)
        Fix buffer over-read vulnerabilities:
          CVE-2017-11541 (safeputs)
          CVE-2017-11542 (PIMv1)