Inability to set theme.url forces me to use a trailing slash when linking to sigal gallery

[stemid]

The way Sigal works now I can't link to domain.tld/mygallery because then the static/ urls will not work. I have to add domain.tld/mygallery/ which is a minor inconvenience when dealing with people who are not very computer literate.

If I could just set theme.url to my own value like ./mygallery or /mygallery to prefix the static path with then this would not be a problem.

Maybe I'm missing something obvious, can I fix this?