BUILD: tree-wide: add several missing activity.h

A number of files currently access activity counters but rely on their
definitions to be inherited from other files (task.c, backend.c hlua.c,
sock.c, pool.c, stats.c, fd.c).

src/backend.c

@@ -21,8 +21,9 @@
 
 #include <import/ebmbtree.h>
 
-#include <haproxy/acl.h>
 #include <haproxy/api.h>
+#include <haproxy/acl.h>
+#include <haproxy/activity.h>
 #include <haproxy/arg.h>
 #include <haproxy/backend.h>
 #include <haproxy/channel.h>

src/fd.c

@@ -88,6 +88,7 @@
 #endif
 
 #include <haproxy/api.h>
+#include <haproxy/activity.h>
 #include <haproxy/cfgparse.h>
 #include <haproxy/fd.h>
 #include <haproxy/global.h>

src/listener.c

@@ -19,6 +19,7 @@
 
 #include <haproxy/acl.h>
 #include <haproxy/api.h>
+#include <haproxy/activity.h>
 #include <haproxy/cfgparse.h>
 #include <haproxy/connection.h>
 #include <haproxy/errors.h>

src/pool.c

@@ -11,7 +11,7 @@
  */
 #include <errno.h>
 
-#include <haproxy/activity-t.h>
+#include <haproxy/activity.h>
 #include <haproxy/api.h>
 #include <haproxy/applet-t.h>
 #include <haproxy/cfgparse.h>

src/sock.c

@@ -26,6 +26,7 @@
 #include <net/if.h>
 
 #include <haproxy/api.h>
+#include <haproxy/activity.h>
 #include <haproxy/connection.h>
 #include <haproxy/listener.h>
 #include <haproxy/log.h>

src/stats.c

@@ -25,6 +25,7 @@
 #include <sys/types.h>
 
 #include <haproxy/api.h>
+#include <haproxy/activity.h>
 #include <haproxy/applet-t.h>
 #include <haproxy/backend.h>
 #include <haproxy/base64.h>

src/task.c

@@ -16,6 +16,7 @@
 #include <import/eb32tree.h>
 
 #include <haproxy/api.h>
+#include <haproxy/activity.h>
 #include <haproxy/cfgparse.h>
 #include <haproxy/fd.h>
 #include <haproxy/list.h>