[PATCH] Docs: Document that taint analyzer checker stops other checkers

[Avinash Sonawane]

Hello!

$ man gcc says that "Some checkers are disabled by default (even with
-fanalyzer), such as the "taint" checker that implements
-Wanalyzer-tainted-array-index, and this option is required to enable
them." but still lists the -Wanalyzer-tainted-* checkers under
-fanalyzer saying "Enabling this option effectively enables the
following warnings:"

This patch comments out the tainted-* checkers so that when
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103533 gets fixed we can
remove the comment and list them under -fanalyzer

Also, the above wording suggests that `-fanalyzer
-fanalyzer-checker=taint` enables the taint checkers in addition to
the default checkers but currently, enabling -fanalyzer-checker=taint
stops other checkers. This patch documents that too.

Please find the attached patch.

Thanks!

Regards,
Avinash Sonawane (rootKea)
https://www.rootkea.me
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