[strongSwan] ikelifetime maximum?

[Tom Rymes]

While perusing the documentation, specifically 
http://wiki.strongswan.org/projects/strongswan/wiki/ConnSection , I 
noticed that a 24h maximum is specified for 'lifetime', but there is no 
maximum specified for 'ikelifetime'.

I don't personally want to use a large 'ikelifetime', but for the sake 
of completeness, I thought it ought to be specified.

Also, I would like to confirm that 'lifetime' is generally set to be 
smaller than 'ikelifetime' (although it doesn't need to be).

Tom