Set up the compression dictionary so that:
- The algorithm does not create a compression symbol that represents
a string of more than 260 characters.
- No character entry has more than 260 total children, including
all sibling descriptors for that character entry.
- No character entry has a child count greater than 6.
- No character entry has more than 4 additional extension characters
when there are 0 or 1 child characters.
- No sibling descriptor indicates 0 sibling characters.
Set up the expansion dictionary so that:
- Expansion of a compression symbol does not use more than 127 dictionary
entries.