Hi,

does anyone know why mm-url is explicitly setting a "Connection"
header on all requests? The ChangeLog doesn't contain any hints why it
was added. It seems to confuse url-http.el of Emacs 22, since it ships
two "Connection" headers with contradicting values:

--8<---------------cut here---------------start------------->8---
tcpdump -i eth0 -X -s 0 port\ http
[...]
 12:47:53.034094 IP tp.42794 > 64.233.167.147.www: P 833:1707(874) ack 906 win 7232
[...]
        0x00b0:  7273 696f 6e3a 2031 2e30 0d0a 436f 6e6e  rsion:.1.0..Conn
        0x00c0:  6563 7469 6f6e 3a20 6b65 6570 2d61 6c69  ection:.keep-ali
        0x00d0:  7665 0d0a 4578 7465 6e73 696f 6e3a 2053  ve..Extension:.S
[...]
        0x0370:  782d 676e 753b 2058 3131 290d 0a43 6f6e  x-gnu;.X11)..Con
        0x0380:  6e65 6374 696f 6e3a 2043 6c6f 7365 0d0a  nection:.Close..
        0x0390:  0d0a                                     ..
--8<---------------cut here---------------end--------------->8---

Applying the following patch makes nnweb.el fully functional for me on
Emacs 22 with mm-url-use-external set to nil. Without it, referring
articles using internal fetching appears to be break when url-http
tries to recycle the connection when following redirects.