Added some more options for unsetopt().
Added some more options for unsetopt().

ninemoreminutes/pycurl,ninemoreminutes/pycurl,m13253/pycurl-python3,ninemoreminutes/pycurl,m13253/pycurl-python3,jcharum/pycurl,m13253/pycurl-python3,jcharum/pycurl,ninemoreminutes/pycurl,jcharum/pycurl