ui-plain: print directory listings

When a user requests a plain view of a tree (as opposed to a blob),
print out a directory listing rather than giving a 404 Not Found.

Also, fix a segfault when ctx->qry.path is NULL - i.e, when /plain is
requested without a path.

Signed-off-by: Mark Lodato <lodatom@gmail.com>
1 file changed