Replace SSL certs via interface

I think a huge feature uberSVN is missing is an administration option to update certificates. This seems like a dirt simple thing to do.    1. Interface to upload the Cert files (including a chain file like GoDaddy uses).  

I think it would be fine to simply overwrite the existing file name with the new cert files.

   2. Alter the extras/httpd-ssl.conf template to use a chain fail if one is added (this works if manually altered).  

#SSLCACertificateFile "/home/build/uberSvnPackaging/root/httpd/conf/ssl.crt/ca-bundle.crt"

   Manually doing this seems to work fine so really all it needs is an interface.