MEDIUM: stats: report the last check and last agent's output on the CSV status

Now that we can quote unsafe string, it becomes possible to dump the health
check responses on the CSV page as well. The two new fields are "last_chk"
and "last_agt".
diff --git a/src/dumpstats.c b/src/dumpstats.c
index 7c21701..1711ac7 100644
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -489,7 +489,7 @@
 	              "hrsp_1xx,hrsp_2xx,hrsp_3xx,hrsp_4xx,hrsp_5xx,hrsp_other,hanafail,"
 	              "req_rate,req_rate_max,req_tot,"
 	              "cli_abrt,srv_abrt,"
-	              "comp_in,comp_out,comp_byp,comp_rsp,lastsess,"
+	              "comp_in,comp_out,comp_byp,comp_rsp,lastsess,last_chk,last_agt,"
 	              "\n");
 }
 
@@ -2743,8 +2743,8 @@
 		chunk_appendf(&trash, "%lld,",
 		              px->fe_counters.p.http.comp_rsp);
 
-		/* lastsess */
-		chunk_appendf(&trash, ",");
+		/* lastsess, last_chk, last_agt, */
+		chunk_appendf(&trash, ",,,");
 
 		/* finish with EOL */
 		chunk_appendf(&trash, "\n");
@@ -2867,8 +2867,8 @@
 		              ",,"
 		              /* compression: in, out, bypassed, comp_rsp */
 		              ",,,,"
-			      /* lastsess */
-			      ","
+			      /* lastsess, last_chk, last_agt, */
+			      ",,,"
 		              "\n",
 		              px->id, l->name,
 		              l->nbconn, l->counters->conn_max,
@@ -3293,6 +3293,10 @@
 		/* lastsess */
 		chunk_appendf(&trash, "%d,", srv_lastsession(sv));
 
+		/* capture of last check and agent statuses */
+		chunk_appendf(&trash, "%s,", ((sv->check.state & (CHK_ST_ENABLED|CHK_ST_PAUSED)) == CHK_ST_ENABLED) ? cstr(sv->check.desc) : "");
+		chunk_appendf(&trash, "%s,", ((sv->agent.state & (CHK_ST_ENABLED|CHK_ST_PAUSED)) == CHK_ST_ENABLED) ? cstr(sv->agent.desc) : "");
+
 		/* finish with EOL */
 		chunk_appendf(&trash, "\n");
 	}
@@ -3523,8 +3527,8 @@
 		/* compression: comp_rsp */
 		chunk_appendf(&trash, "%lld,", px->be_counters.p.http.comp_rsp);
 
-		/* lastsess */
-		chunk_appendf(&trash, "%d,", be_lastsession(px));
+		/* lastsess, last_chk, last_agt, */
+		chunk_appendf(&trash, "%d,,,", be_lastsession(px));
 
 		/* finish with EOL */
 		chunk_appendf(&trash, "\n");