path: hide the dotgit file functions

These can't go into the public API yet as we don't want to introduce API or ABI
changes in a security release.

Author: carlosmn

include/git2/sys/path.h

@@ -644,4 +644,25 @@ extern bool git_path_isvalid(
  */
 int git_path_normalize_slashes(git_buf *out, const char *path);
 
+/**
+ * Check whether a path component corresponds to a .gitmodules file
+ *
+ * @param name the path component to check
+ */
+extern int git_path_is_dotgit_modules(const char *name);
+
+/**
+ * Check whether a path component corresponds to a .gitignore file
+ *
+ * @param name the path component to check
+ */
+extern int git_path_is_dotgit_ignore(const char *name);
+
+/**
+ * Check whether a path component corresponds to a .gitignore file
+ *
+ * @param name the path component to check
+ */
+extern int git_path_is_dotgit_attributes(const char *name);
+
 #endif

src/path.h

@@ -1,8 +1,6 @@
 #include "clar_libgit2.h"
 #include "path.h"
 
-#include "git2/sys/path.h"
-
 static char *gitmodules_altnames[] = {
 	".gitmodules",