Escape 'PKCS#11 support' in configure summary
Escape 'PKCS#11 support' in configure summary

Otherwise, autoconf 2.63 on CentOS6 complains:

/usr/bin/m4:configure.ac:1088: ERROR: end of file in argument list
autom4te: /usr/bin/m4 failed with exit status: 1
aclocal: autom4te failed with exit status: 1

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

nmav/openconnect-mine,mtmiller/openconnect,brandt/openconnect,mtmiller/openconnect,mtmiller/openconnect,cernekee/openconnect,cernekee/openconnect,brandt/openconnect,nmav/openconnect-mine,cernekee/openconnect,mtmiller/openconnect,brandt/openconnect,nmav/openconnect-mine,nmav/openconnect-mine,cernekee/openconnect,brandt/openconnect