Why does "could not open include filename: '/etc/ipsec.d/*.conf" messages appear while starting or stopping openswan service in RHEL5?

Issue

• We see following messages appearing while starting or stopping openswan service:

 localhost ipsec_setup: ...Openswan IPsec started 
 localhost ipsec_starter[12026]: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and ) 
 localhost ipsec__plutorun: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and )
 localhost ipsec_setup: Starting Openswan IPsec U2.6.14/K2.6.18-308.24.1.el5...
 localhost ipsec_starter[12031]: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and ) 
 localhost ipsec__plutorun: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and )
 localhost ipsec_setup: 
 localhost ipsec_starter[12032]: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and ) 
 localhost ipsec__plutorun: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and )
 localhost ipsec_setup: 
 localhost ipsec_setup: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and )
 localhost hpiod: 1.6.7 accepting connections at 2208...    <<<--

 localhost ipsec_starter[28276]: could not open include filename: '/etc/ipsec.d/*.conf' (tried  and ) 
 localhost rmmod: ERROR: Module xfrm6_tunnel is in use by ipcomp6 
 localhost kernel: NET: Unregistered protocol family 15
 localhost ipsec_setup: ...Openswan IPsec stopped
 localhost ipsec_setup: Stopping Openswan IPsec...

• Although such the ipsec service runs properly and there are no issues seen with the service itself.

• Why are such messages seen? What is causing it?