`cabal build` documentation is useless

**What is wrong with the docs?**
`cabal build` refers you to `cabal configure`, but that only makes sense if it means `v1-configure`.

**Additional context**
> Beyond a list of targets, `cabal build` accepts all the flags that `cabal configure` takes. Most of these flags are only taken into consideration when building local packages; however, some flags may cause extra store packages to be built (for example, `--enable-profiling` will automatically make sure profiling libraries for all transitive dependencies are built and installed.)