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.

tool/decode/elf.c

@@ -302,7 +302,7 @@ static void printelfrelocations(void) {
 
 int main(int argc, char *argv[]) {
   int fd;
-  showcrashreports();
+  ShowCrashReports();
   if (argc != 2) {
     fprintf(stderr, "usage: %s FILE\n", argv[0]);
     return 1;

tool/decode/scrubdox.c

@@ -150,7 +150,7 @@ static void DoIt(int y, int x) {
 int main(int argc, char *argv[]) {
   char *s;
   int y, x;
-  showcrashreports();
+  ShowCrashReports();
   f = stdin;
   while ((s = chomp(xgetline(f)))) {
     n = strwidth(s, 0);

tool/decode/zip.c

@@ -488,7 +488,7 @@ int main(int argc, char *argv[]) {
   int fd;
   uint8_t *map;
   struct stat st;
-  showcrashreports();
+  ShowCrashReports();
   CHECK_EQ(2, argc);
   CHECK_NE(-1, (fd = open(argv[1], O_RDONLY)));
   CHECK_NE(-1, fstat(fd, &st));

tool/decode/zip2.c

@@ -266,7 +266,7 @@ int main(int argc, char *argv[]) {
   int fd;
   uint8_t *map;
   struct stat st;
-  showcrashreports();
+  ShowCrashReports();
   CHECK_EQ(2, argc);
   CHECK_NE(-1, (fd = open(argv[1], O_RDONLY)));
   CHECK_NE(-1, fstat(fd, &st));