Turn on/off SSL. This flag must be set before starting session. If you
change use_ssl value after session
started, a Net::HTTP object raises IOError.
# File lib/net/http.rb, line 755
def use_ssl=(flag)
flag = flag ? true : false
if started? and @use_ssl != flag
raise IOError, "use_ssl value changed, but session already started"
end
@use_ssl = flag
end