[getdns-api] changes to signatures of data helper functions

[Wiley, Glen]

I'd like to change the signatures for the non-trivial data type helper functions to include the context so that we will have access to the user defined allocators.  For example

getdns_return_t getdns_list_copy(struct getdns_list *srclist, struct getdns_list **dstlist);

becomes:

getdns_return_t getdns_list_copy(getdns_context_t context, struct getdns_list *srclist, struct getdns_list **dstlist);

And

getdns_return_t getdns_dict_get_names(struct getdns_dict *dict, struct getdns_list **answer);

Becomes

getdns_return_t getdns_dict_get_names(getdns_context_t context, struct getdns_dict *dict, struct getdns_list **answer);

Each helper function that may involve significant use of a user defined allocator would end up with the context as arg 0.


What do folks think?

--
Glen Wiley
KK4SFV
Sr. Engineer
The Hive, Verisign, Inc.
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