QDoc's showinternal configuration option has inconsistent behavior when set in both .qdocconf files and via command-line. The command-line -showinternal flag fails to properly override config file settings. This is due to:

• Config file values being loaded after command-line processing without checking for precedence.
• Inconsistent usage where some code reads from CONFIG_SHOWINTERNAL while others use showInternal(), potentially seeing different values.

The fix ensures command-line options take precedence over config file settings and makes all code paths use the same value source.