Add several configuration files to auto-mode-alist

* lisp/files.el (auto-mode-alist): Use conf-mode for .asoundrc,
.mairixrc, .mbsyncr, .msmtprc, .nvidia-settings-rc, .offlineimaprc,
.reportbugrc, .rtorrent.rc, .screenrc, .mpdconf, .notmuch-config.  Use
conf-windows-mode for .redshift.conf.  (Bug#38065)
1 job for master in 59 minutes and 8 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #4186
test-all

00:59:08

 
Name Stage Failure
failed
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:294: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:959: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1