Convert hashtable usage over to khash

This updates khash.h with some extra features (like error checking
on allocations, ability to use wrapped malloc, foreach calls, etc),
creates two high-level wrappers around khash: `git_khash_str` and
`git_khash_oid` for string-to-void-ptr and oid-to-void-ptr tables,
then converts all of the old usage of `git_hashtable` over to use
these new hashtables.

For `git_khash_str`, I've tried to create a set of macros that
yield an API not too unlike the old `git_hashtable` API.  Since
the oid hashtable is only used in one file, I haven't bother to
set up all those macros and just use the khash APIs directly for
now.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/repository.h b/src/repository.h
index 178f29742..f53fa697e 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -13,13 +13,13 @@
 #include "git2/repository.h"
 #include "git2/object.h"
 
-#include "hashtable.h"
 #include "index.h"
 #include "cache.h"
 #include "refs.h"
 #include "buffer.h"
 #include "odb.h"
 #include "attr.h"
+#include "khash_str.h"
 
 #define DOT_GIT ".git"
 #define GIT_DIR DOT_GIT "/"
@@ -83,7 +83,7 @@ struct git_repository {
 	git_cache objects;
 	git_refcache references;
 	git_attr_cache attrcache;
-	git_hashtable *submodules;
+	git_khash_str *submodules;
 
 	char *path_repository;
 	char *workdir;