* General ones (works with sorted and unsorted lists as well)
+`string_list_init`::
+
+ Initialize the members of the string_list, set `strdup_strings`
+ member according to the value of the second parameter.
+
`filter_string_list`::
Apply a function to each item in a list, retaining only the
You should not tamper with it.
. Setting the `strdup_strings` member to 1 will strdup() the strings
before adding them, see above.
+. The `compare_strings_fn` member is used to specify a custom compare
+ function, otherwise `strcmp()` is used as the default function.