YAZ_EXPORT int z_GDU (ODR o, Z_GDU **p, int opt, const char *name);
YAZ_EXPORT void z_HTTP_header_add(ODR o, Z_HTTP_Header **hp, const char *n,
const char *v);
+YAZ_EXPORT void z_HTTP_header_set(ODR o, Z_HTTP_Header **hp, const char *n,
+ const char *v);
YAZ_EXPORT void z_HTTP_header_add_content_type(ODR o, Z_HTTP_Header **hp,
const char *content_type,
const char *charset);