config: add repo inline-readme list

This allows the user to choose to override any global
inline-readme list for a specific repo, using the
same kind of semantics as the other repo overrides.

Signed-off-by: Andy Green <andy@warmcat.com>
Reviewed-by: John Keeping <john@keeping.me.uk>
diff --git a/cgit.h b/cgit.h
index 981524a..999db9e 100644
--- a/cgit.h
+++ b/cgit.h
@@ -86,6 +86,7 @@
 	char *defbranch;
 	char *module_link;
 	struct string_list readme;
+	struct string_list inline_readme;
 	char *section;
 	char *clone_url;
 	char *logo;