[squid-users] ipf transparent enabled, but squid says not supported

[Stephen Borrill]

I have:
Squid Cache: Version 3.5.4
Service Name: squid
configure options:  '--sysconfdir=/usr/pkg/etc/squid'
'--localstatedir=/var/squid' '--datarootdir=/usr/pkg/share/squid'
'--disable-strict-error-checking' '--enable-auth'
'--enable-cachemgr-hostname=localhost' '--enable-delay-pools'
'--enable-icap-client' '--enable-icmp' '--enable-poll'
'--enable-removal-policies=lru,heap'
'--enable-storeio=ufs diskd' '--with-aio' '--with-default-user=squid' 
'--with-pidfile=/var/run/squid.pid' '--disable-arch-native'
'--enable-ipf-transparent' '--enable-arp-acl' '--enable-carp' 
'--disable-ipv6' '--without-mit-krb5' '--without-heimdal-krb5' 
'--disable-snmp' '--enable-ssl' '--with-openssl=/usr/pkg'
'--enable-auth-basic=NCSA getpwnam PAM' '--enable-auth-digest=file'
'--disable-auth-negotiate' '--enable-auth-ntlm=fake smb_lm'
'--enable-external-acl-helpers=file_userip unix_group' 
'--prefix=/usr/pkg' '--build=i486--netbsdelf'
'--host=i486--netbsdelf' '--mandir=/usr/pkg/man' 
'build_alias=i486--netbsdelf' 'host_alias=i486--netbsdelf'
'CC=cc' 'CFLAGS=-O2 -I/usr/include -I/usr/pkg/include'
'LDFLAGS=-L/usr/lib -Wl,-R/usr/lib -L/usr/pkg/lib -Wl,-R/usr/pkg/lib' 
'LIBS=' 'CPPFLAGS=-I/usr/include -I/usr/pkg/include'
'CXX=c++' 'CXXFLAGS=-O2 -I/usr/include -I/usr/pkg/include'

squid.conf contains:
http_port 127.0.0.1:8006 intercept name=port_8006

Yet I see the following ev:
2015/05/27 16:02:46 kid1| WARNING: transparent proxying not supported

Same config works with earlier version of squid (3.4 and earlier). 
What's changed?

-- 
Stephen