[clang] [analyzer][clangsa] Add new option to alpha.security.cert.InvalidPtrChecker (PR #67663)

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Endre =?utf-8?q?Fülöp?= <endre.fulop at sigmatechnology.se>,
Endre =?utf-8?q?Fülöp?= <endre.fulop at sigmatechnology.se>,
Endre =?utf-8?q?Fülöp?= <endre.fulop at sigmatechnology.se>,
Endre =?utf-8?q?Fülöp?= <endre.fulop at sigmatechnology.se>,
Endre =?utf-8?q?Fülöp?= <endre.fulop at sigmatechnology.se>,
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In-Reply-To: <llvm/llvm-project/pull/67663/clang at github.com>


================
@@ -2399,13 +2399,34 @@ pointer. These functions include: getenv, localeconv, asctime, setlocale, strerr
     char *p, *pp;
 
     p = getenv("VAR");
-    pp = getenv("VAR2");
-    // subsequent call to 'getenv' invalidated previous one
+    setenv("SOMEVAR", "VALUE", /*overwrite*/1);
----------------
DonatNagyE wrote:

```suggestion
    setenv("SOMEVAR", "VALUE", /*overwrite = */1);
```
Very minor bikeshedding ;)

https://github.com/llvm/llvm-project/pull/67663