pool: Move the pool utility to its own directory in src

src/libhydra/plugins/attr_sql/Makefile.am

@@ -1,7 +1,6 @@
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/libstrongswan \
-	-I$(top_srcdir)/src/libhydra \
-	-DPLUGINS=\""${pool_plugins}\""
+	-I$(top_srcdir)/src/libhydra
 
 AM_CFLAGS = \
 	-rdynamic
@@ -17,10 +16,3 @@ libstrongswan_attr_sql_la_SOURCES = \
 	sql_attribute.h sql_attribute.c
 
 libstrongswan_attr_sql_la_LDFLAGS = -module -avoid-version
-
-ipsec_PROGRAMS = pool
-pool_SOURCES = pool.c pool_attributes.c pool_attributes.h \
-			   pool_usage.h pool_usage.c
-pool_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la \
-			 $(top_builddir)/src/libhydra/libhydra.la
-pool.o :	$(top_builddir)/config.status