Additions to rssget and make rssadd accept url tags as $2

[miliukhin]

Improve rssget: now able to parse YouTube @username urls, watch urls,
and Telegram urls (feeds for Telegram are generated by rss-bridge). Make rssadd accept tags as "$2".

[miliukhin]

bookmark script asks you what to bookmark via dmenu and then does the bookmarking. Allows tagging.
It bookmarks urls just like bookmarkthis, but from the clipboard (when using Vim Vixen it's very convenient to just press "y" and then the bookmarking shortcut to save the link, and there are some other cases when this way is more comfy).
For RSS feeds, it uses rssget.
One question you may have: "Why bookmark songs?" - Well, sometimes I listen to internet radio streams, and it's nice to be able to quickly save the names of the songs I like to look them up later.

Of course, dwm bindings are needed:

{ MODKEY|ShiftMask,		XK_b,		spawn,		{.v = (const char*[]){ "bookmark", NULL } } },
{ MODKEY,			XK_Insert,	spawn,		SHCMD("xdotool type $(grep -v '^#' ~/.local/share/larbs/snippets | dmenu -i -l 50 | cut -d' ' -f1)") },

I think they're identical to those in "Bookmarking for UNIX Chads" video.