Merge pull request #111 from nawawi/master

ui_link conversion
Allow HELO name to be specified https://sourceforge.net/p/webadmin/discussion/600155/thread/4a465885/
Support SD / MMC disks http://sourceforge.net/p/webadmin/bugs/4334/
fix some warnings
Merge branch 'master' of git@github.com:webmin/webmin