ATTACHURL -- full URL for attachments in the current topic

• Syntax: %ATTACHURL%
• Expands to: https://wiki.wcr.ethz.ch/pub/System/VarATTACHURL
• Example: If you attach a file you can refer to it as %ATTACHURL%/image.gif
• Related: ATTACHURLPATH, PUBURL, PUBURLPATH, SCRIPTURL, SCRIPTURLPATH, FileAttachments