patch 7.4.1384
Problem:    It is not easy to use a set of plugins and their dependencies.
Solution:   Add packages, ":loadopt", 'packpath'.
diff --git a/src/proto/ex_cmds2.pro b/src/proto/ex_cmds2.pro
index a73e10f..3eabcbd 100644
--- a/src/proto/ex_cmds2.pro
+++ b/src/proto/ex_cmds2.pro
@@ -62,6 +62,8 @@
 void ex_runtime(exarg_T *eap);
 int source_runtime(char_u *name, int all);
 int do_in_runtimepath(char_u *name, int all, void (*callback)(char_u *fname, void *ck), void *cookie);
+void source_packages(void);
+void ex_loadplugin(exarg_T *eap);
 void ex_options(exarg_T *eap);
 void ex_source(exarg_T *eap);
 linenr_T *source_breakpoint(void *cookie);