Rename function to reflect that it is only used for precomputation.
The token IDs are not really needed, so don't bother to compute
the array of tokens.
Adds word counts from a full planet to the word table. There is a
new configuration option CONST_Max_Word_Frequency which allows to
take into account the word count: the value that was set on import
is used to determine if a word is added to the search_name table.
The value during runtime determines if a single term should be
used for partial search or simply be ignored.
