Document some additional -t tool flags

[jyn514]

Fixes #2658

[digit-google]

I'd prefer not to document all tool options in the manual, just add a line that says that each tool may have custom options that change its behavior, and to call it with --help to see details.

Technically, this PR is missing a lot of other tool options anyway. Plus since some options are added over time, this makes phrases like "Available since Ninja 1.12" incomplete / misleading anyway in general, unless one wants to document it for every tool option. This would be a needless maintenance burden.

[jyn514]

I'd prefer not to document all tool options in the manual, just add a line that says that each tool may have custom options that change its behavior, and to call it with --help to see details.

unfortunately --help doesn't work for all tools:

$ ninja -t cleandead --help
Cleaning... 1 files.

so we'd have to document which tools support --help, which doesn't seem like any less of a burden.

since some options are added over time, this makes phrases like "Available since Ninja 1.12" incomplete / misleading anyway in general, unless one wants to document it for every tool option.

maybe we can put a note at the top of the section that "Available since" is only about the tool itself, not its options? i agree that documenting when options were introduced would be a maintenance burden.

[digit-google]

Good point. I'd be in favor of adding --help support to all tools instead, except maybe the urtle one ;-)

[jyn514]

OMG that's a good tool