v0.15.0

• dav:// connections work: the WebDAV client's HTTP library refused PROPFIND, MKCOL and MOVE as methods HTTP/1.1 does not define, so every WebDAV connect failed at its first listing; proven by hcmd connecting to its own Ctrl+N share.
• Ctrl+N listens on serve.port (8080; any free port when that is taken, and the dialog says so) so a firewall rule can name it; the dialog names the host firewall that is on - ufw, firewalld, nftables or iptables - says whether it blocks the port, and shows the command that opens it.
• The serve dialog has a Stop serving button, a ten-row request log, and a fixed size that truncates long lines instead of growing.
• In the rendered view the focused link is the one the cursor stands in: Tab finds the next link after the cursor and puts the cursor on it, and moving off a link drops its underline and marker.