Command-line help does not show default values for parameters.

[rayn316]

Problem

Since there are no default values, it's unclear how much to adjust from the original basis.
For example, such a setting.

        --accounts-index-bins <BINS>
            Number of bins to divide the accounts index into

Proposed Solution

[corlinp]

FWIW the default for this is currently 8192:

agave/accounts-db/src/accounts_index.rs

Line 45 in 278b447

pub const BINS_DEFAULT: usize = 8192;