Close config_fd before returning from write_new_config()
Close config_fd before returning from write_new_config()

Spotted by Coverity.

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

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