bug#19070: 25.0.50; Provide a user option that filters the buffer list for `switch-to-next-buffer'

[Drew Adams]

Enhancement request.

Provide a user option with a regexp value that filters the buffers (by
name) that are cycled through by `next-buffer' and `previous-buffer'.
Buffer names matching the regexp would be excluded.

The default value should not exclude any buffers.

Or the option could be a cons, with one part determining whether the
regexp is used to exclude or include and the other part being the
regexp.

In GNU Emacs 25.0.50.1 (i686-pc-mingw32)
 of 2014-10-20 on LEG570
Bzr revision: 118168 rgm@gnu.org-20141020195941-icp42t8ttcnud09g
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --enable-checking=yes,glyphs CPPFLAGS=-DGLYPH_DEBUG=1'