main: Add openconnect_vpninfo_free() on a couple of exit paths
main: Add openconnect_vpninfo_free() on a couple of exit paths

This makes it easier to check for library memory leaks.

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

brandt/openconnect,mveplus/openconnect-client,liiir1985/openconnect,lins05/openconnect,lins05/openconnect,brandt/openconnect,brandt/openconnect,mveplus/openconnect-client,mveplus/openconnect-client,atyndall/openconnect,liiir1985/openconnect,cernekee/openconnect,chadcatlett/openconnect,nmav/openconnect-mine,neshema/openconnect,chadcatlett/openconnect,neshema/openconnect,mtmiller/openconnect,neshema/openconnect,nmav/openconnect-mine,cernekee/openconnect,mtmiller/openconnect,nmav/openconnect-mine,don-johnny/openconnect,atyndall/openconnect,matlockx/openconnect,matlockx/openconnect,atyndall/openconnect,cernekee/openconnect,liiir1985/openconnect,atyndall/openconnect,matlockx/openconnect,lins05/openconnect,don-johnny/openconnect,cernekee/openconnect,mveplus/openconnect-client,mtmiller/openconnect,matlockx/openconnect,lins05/openconnect,chadcatlett/openconnect,brandt/openconnect,nmav/openconnect-mine,chadcatlett/openconnect,liiir1985/openconnect,mtmiller/openconnect,don-johnny/openconnect,don-johnny/openconnect,neshema/openconnect