Fix use-after-free of numeric IPv6 hostname on error path
Fix use-after-free of numeric IPv6 hostname on error path

Spotted by Coverity.

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

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