* replace require function calls with stndse.silent_require
* fixed a bug in nse_main that would fail creating scripts.db when a script
fails to load
* reworked some code to provide limited functionality even though SSL is not
present
The wsdd library incorrectly assumed OpenSSL to always be available and the
ssh-hostkey used the undeclared SCRIPT_NAME in message when evaluating SSL
support. The bug was reported by Michael Pattrick on nmap-dev:
http://seclists.org/nmap-dev/2011/q1/312
[Patrik]