[clang] [clang][analyzer]Add TaintPropagation:EnableDefaultConfig config parameter (PR #176185)

[Donát Nagy via cfe-commits]

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@@ -1371,8 +1371,12 @@ For a more detailed description of configuration options, please see the
 
 **Configuration**
 
-* `Config`  Specifies the name of the YAML configuration file. The user can
+* `optin.taint.TaintPropagation:Config`  Specifies the name of the YAML configuration file. The user can
   define their own taint sources and sinks.
+* `optin.taint.TaintPropagation:EnableDefaultConfig` If set to true,
+   the default source, sink and propagation rules are loaded. Consider
+   setting it to false, if you want a fully custom taint configuration
+   without the defaults.
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NagyDonat wrote:

```suggestion
   the default source, sink and propagation rules are loaded. Advanced
   users may want set it to false if they want to fully customize their taint
   model.
```
Emphasize that this is an advanced feature. The original with "Consider..." sounded as if this was an option that may be interesting for anyone.

https://github.com/llvm/llvm-project/pull/176185