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/auto-launch-gdb-on-crash.c

@@ -40,7 +40,7 @@
  */
 
 int main(int argc, char *argv[]) {
-  showcrashreports();
+  ShowCrashReports();
   asm("int3"); /* cf. __die(), perror("msg"), abort(), exit(1), _Exit(1) */
   return 0;
 }

examples/breakpoint.c

@@ -14,7 +14,7 @@
 #include "libc/stdio/stdio.h"
 
 int main(int argc, char *argv[]) {
-  showcrashreports();
+  ShowCrashReports();
   if (IsDebuggerPresent(false)) {
     printf("debugger found!\r\n");
     DebugBreak();

examples/crashreport.c

@@ -24,6 +24,6 @@
 
 int main(int argc, char *argv[]) {
   volatile int64_t x;
-  showcrashreports();
+  ShowCrashReports();
   return 1 / (x = 0);
 }

examples/curl.c

@@ -121,7 +121,7 @@ static wontreturn void PrintUsage(FILE *f, int rc) {
 }
 
 int main(int argc, char *argv[]) {
-  if (!NoDebug()) showcrashreports();
+  if (!NoDebug()) ShowCrashReports();
 
   /*
    * Read flags.

examples/datauri.c

@@ -43,7 +43,7 @@ void PrintUri(const char *path) {
 }
 
 int main(int argc, char *argv[]) {
-  showcrashreports();
+  ShowCrashReports();
   int i;
   while ((i = getopt(argc, argv, "?h")) != -1) {
     switch (i) {

examples/img.c

@@ -67,7 +67,7 @@ void PrintImg(const char *path) {
 }
 
 int main(int argc, char *argv[]) {
-  showcrashreports();
+  ShowCrashReports();
   int i;
   while ((i = getopt(argc, argv, "?huas01234")) != -1) {
     switch (i) {

examples/ispell.c

@@ -153,7 +153,7 @@ void LoadWords(void) {
 }
 
 int main(int argc, char *argv[]) {
-  showcrashreports();
+  ShowCrashReports();
   LoadWords();
   SpellChecker();
   return 0;

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();

examples/uname.c

@@ -0,0 +1,24 @@
+#if 0
+/*─────────────────────────────────────────────────────────────────╗
+│ To the extent possible under law, Justine Tunney has waived      │
+│ all copyright and related or neighboring rights to this file,    │
+│ as it is written in the following disclaimers:                   │
+│   • http://unlicense.org/                                        │
+│   • http://creativecommons.org/publicdomain/zero/1.0/            │
+╚─────────────────────────────────────────────────────────────────*/
+#endif
+#include "libc/calls/calls.h"
+#include "libc/calls/struct/utsname.h"
+#include "libc/stdio/stdio.h"
+
+int main(int argc, char *argv[]) {
+  struct utsname names;
+  if (uname(&names)) return 1;
+  printf("%-10s %s\n", "sysname", names.sysname);
+  printf("%-10s %s\n", "nodename", names.nodename);
+  printf("%-10s %s\n", "release", names.release);
+  printf("%-10s %s\n", "version", names.version);
+  printf("%-10s %s\n", "machine", names.machine);
+  printf("%-10s %s\n", "domainname", names.domainname);
+  return 0;
+}