Restart CI for New Technology and UBSAN hunting

Continuous Integration (via runit and runitd) is now re-enabled on win7
and win10. The `make test` command, which runs the tests on all systems
is now the fastest and most stable it's been since the project started.

UBSAN is now enabled in MODE=dbg in addition to ASAN. Many instances of
undefined behavior have been removed. Mostly things like passing a NULL
argument to memcpy(), which works fine with Cosmopolitan Libc, but that
doesn't prevents the compiler from being unhappy. There was an issue w/
GNU make where static analysis claims a sprintf() call can overflow. We
also now have nicer looking crash reports on Windows since uname should
now be supported and msys64 addr2line works reliably.

examples/panels.c

@@ -152,7 +152,7 @@ void Draw(void) {
 int main(int argc, char *argv[]) {
   struct sigaction sa[2] = {{.sa_handler = OnShutdown},
                             {.sa_handler = OnInvalidate}};
-  showcrashreports();
+  ShowCrashReports();
   Setup();
   Enter();
   GetTtySize();