Fix handling of GEN_IPADD altnames.
Fix handling of GEN_IPADD altnames.

In particular, the length of the altname wasn't the same as the length
of the corresponding sockaddr.

Signed-off-by: David Woodhouse <b460d66aaf00c296a3db1c1d9eeafc081d5f7d70@intel.com>

mveplus/openconnect-client,chadcatlett/openconnect,don-johnny/openconnect,pbrook/openconnect,atyndall/openconnect,brandt/openconnect,mdutton3/OpenConnect,lins05/openconnect,don-johnny/openconnect,liiir1985/openconnect,nmav/openconnect-mine,matlockx/openconnect,certik/openconnect,neshema/openconnect,brandt/openconnect,brandt/openconnect,liiir1985/openconnect,chadcatlett/openconnect,mtmiller/openconnect,sihde/openconnect,atyndall/openconnect,matlockx/openconnect,matlockx/openconnect,don-johnny/openconnect,lins05/openconnect,matlockx/openconnect,lins05/openconnect,mtmiller/openconnect,mveplus/openconnect-client,pbrook/openconnect,cernekee/openconnect,certik/openconnect,mtmiller/openconnect,mdutton3/OpenConnect,chadcatlett/openconnect,don-johnny/openconnect,mveplus/openconnect-client,lins05/openconnect,chadcatlett/openconnect,ldx/android_external_openconnect,nmav/openconnect-mine,neshema/openconnect,cernekee/openconnect,ldx/android_external_openconnect,certik/openconnect,liiir1985/openconnect,atyndall/openconnect,mtmiller/openconnect,atyndall/openconnect,nmav/openconnect-mine,mdutton3/OpenConnect,nmav/openconnect-mine,sihde/openconnect,sihde/openconnect,mveplus/openconnect-client,neshema/openconnect,liiir1985/openconnect,brandt/openconnect,cernekee/openconnect,cernekee/openconnect,neshema/openconnect