Add the case that location of missing characters is not known.

[Coding-Enthusiast]

Base-58 service only supports the case when the user knows the location of missing characters.
A new option is needed for when that location is not known. But the option has to work with any number of missing characters without needing to hard-code each case individually.

[Coding-Enthusiast]

73e8596 solves this for a special case (compressed key missing 3 chars).
We can add more code for a couple more small cases (3 missing is already 4 billion keys to check).

[Coding-Enthusiast]

305a535 solves this for special case (both compressed and uncompressed keys missing 1 char).

[Coding-Enthusiast]

8d13be8 solves this for special case (both compressed and uncompressed keys missing 2 chars) which closes this issue.

We can add the case for >= 4 chars missing but the number of keys to check grows fast and the colde also becomes very slow 2.9k -> 4.2 mil -> 4.0 bil -> 2.8 tril -> 1.5 quad.
I prefer postponing any additional work on this to after code including SHA got more optimized (eg. using SIMD) and GPU support is added.