Add plugin calling support

This patch adds a simple plugin system that makes simple problems easy to
solve, and difficult problems, such as SELinux, possible.

When the transaction gets to the point where a collection action should occur,
it expands a macro of the form %__collection_<collection name> to get the path
to a plugin and any additional options. The plugin is dlopen'ed, and the
appropriate function is called in the plugin, with the additional arguments
passed in.

This also adds a --nocollections option to disable performing Collection
actions.

1 files changed, 2 insertions, 0 deletions

diff --git a/system.h b/system.h
index ac18e16fa..e34f6d6d1 100644
--- a/system.h
+++ b/system.h
@@ -144,4 +144,6 @@ extern const char *__progname;
 #include "misc/fnmatch.h"
 #endif
 
+#include <dlfcn.h>
+
 #endif	/* H_SYSTEM */