Make exciting improvements

- Add Lua backtraces to redbean!
- Wipe serving keys after redbean forks
- Audit redbean to remove free via exit
- Log SSL client ciphersuite preferences
- Increase ASAN malloc() backtrace depth
- Make GetSslRoots() behave as a singleton
- Move leaks.c from LIBC_TESTLIB to LIBC_LOG
- Add undocumented %n to printf() for newlines
- Fix redbean memory leak reindexing inode change
- Fix redbean memory leak with Fetch() DNS object
- Restore original environ after __cxa_finalize()
- Make backtrace always work after __cxa_finalize()
- Introduce COUNTEXPR() diagnostic / benchmark tool
- Fix a few more instances of errno being clobbered
- Consolidate the ANSI color disabling internal APIs

libc/log/addr2linepath.c

@@ -18,6 +18,20 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/log/log.h"
 
-const char *GetAddr2linePath(void) {
-  return commandvenv("ADDR2LINE", "addr2line");
+static const char *__addr2line;
+
+static textstartup void __addr2line_init() {
+  static bool once;
+  if (!once) {
+    __addr2line = commandvenv("ADDR2LINE", "addr2line");
+    once = true;
+  }
 }
+
+const char *GetAddr2linePath(void) {
+  return __addr2line;
+}
+
+const void *const __addr2line_ctor[] initarray = {
+    __addr2line_init,
+};