[MINOR] add a weight divisor to the struct proxy

Under some circumstances, it will be useful to be able to have
a server's effective weight bigger than the user weight, and this
is particularly true for dynamic weight-based algorithms. In order
to support this, we add a "wdiv" member to the lbprm structure
which will always be used to divide the weights before reporting
them.
diff --git a/include/proto/backend.h b/include/proto/backend.h
index 7414ede..8fa8c83 100644
--- a/include/proto/backend.h
+++ b/include/proto/backend.h
@@ -42,6 +42,7 @@
 void recount_servers(struct proxy *px);
 void recalc_server_map(struct proxy *px);
 int be_downtime(struct proxy *px);
+void init_server_map(struct proxy *p);
 
 /*
  * This function tries to find a running server with free connection slots for
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 03f9601..53de513 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -86,6 +86,7 @@
 		int tot_weight;			/* total effective weight of servers participating to LB */
 		int tot_used;			/* total number of servers used for LB */
 		int wmult;			/* ratio between user weight and effective weight */
+		int wdiv;			/* ratio between effective weight and user weight */
 		struct {
 			struct server **srv;	/* the server map used to apply weights */
 			int rr_idx;		/* next server to be elected in round robin mode */