Dacutil

> add function `df_fixchar` and `df_replace`
> optional: function `get_config` agument: `age_key` check `AGE-SECRET-KEY-`

> **Update** `encrypt_b64` add option `wrap` for wrapping encoded lines

> **Add** crypt function `from dacutil import crypt`
>

> - **Remove** function `new_dt`, `date_today`
> - fix bug `datediff`
>

> - add function `worker`
>