MINOR: spoe: Add a pointer on the filter config in the spoe_agent structure

There was no way to access the SPOE filter configuration from the agent
object. However it could be handy to have it. And in fact, this will be
required to fix a bug.

(cherry picked from commit 434b8525ee333f511b5461eae41b23842d3636d4)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 541e261ce3c1af30e172ab97d8ce8e865a941e77)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 0ee26e9b6d0b2163d5fb8b1d287dfe090fb25008)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit a2f97ea1f8a1a887f6d39f1967a699c67cff9c0f)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/src/flt_spoe.c b/src/flt_spoe.c
index 026e5c4..9ddffa8 100644
--- a/src/flt_spoe.c
+++ b/src/flt_spoe.c
@@ -4440,6 +4440,7 @@
 
 	conf->id    = strdup(engine ? engine : curagent->id);
 	conf->agent = curagent;
+	curagent->spoe_conf = conf;
 
 	/* Start agent's proxy initialization here. It will be finished during
 	 * the filter init. */