Completely new asso_values search algorithm.

tests/test-6.exp

@@ -87,12 +87,6 @@ Algorithm employed by gperf:
                          $,1,2,4,6-10.
   -D, --duplicates       Handle keywords that hash to duplicate values. This
                          is useful for certain highly redundant keyword sets.
-  -f, --fast=ITERATIONS  Generate the gen-perf.hash function "fast". This
-                         decreases gperf's running time at the cost of
-                         minimizing generated table size. The numeric
-                         argument represents the number of times to iterate
-                         when resolving a collision. '0' means "iterate by
-                         the number of keywords".
   -m, --multiple-iterations=ITERATIONS
                          Perform multiple choices of the -i and -j values,
                          and choose the best results. This increases the
@@ -106,9 +100,6 @@ Algorithm employed by gperf:
                          be an odd number, default is 5.
   -n, --no-strlen        Do not include the length of the keyword when
                          computing the hash function.
-  -o, --occurrence-sort  Reorders input keys by frequency of occurrence of
-                         the key sets. This should decrease the search time
-                         dramatically.
   -r, --random           Utilizes randomness to initialize the associated
                          values table.
   -s, --size-multiple=N  Affects the size of the generated hash table. The