* [Bug 2145] ntpq dumps core when displaying sys_var_list and more.

* [Bug 1485] Sometimes ntpd crashes

* [Bug 2382] Implement LOGTOD using ldexp() instead of shifting.

* [Bug 1866] Disable some debugging output in refclock_oncore.

* [Bug 2149] Log an error message if /proc/net/if_inet6 cannot be ope…

…ned.

* Bump sntp/include/autogen-version.def .

* [Bug 2357] sntp/libopts/usage.c sometimes needs -lintl.

* Upgrade to libopts from 5.17.3pre10.

* [Bug 2364] "sed -i" is not portable.

* [Bug 2357] sntp/libopts/usage.c sometimes needs -lintl.

* [Bug 2365] "make check" fails in libevent.

* Upgrade libevent (coverity fixes, etc.).

* EEXIST is OK for mkdir() in sntp/kod_management.c.

* [Bug 2359] Fix send_via_ntp_signd() prototype.