bug#8096: 24.0.50; Please add "regexp search" to the Emacs manual index

[Drew Adams]

Yes, we already index isearch-(for|back)ward-regexp, but just as it is
helpful that the node be named `Regexp Search' so it would be helpful to
add `regexp search' to the index.
 

In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
 of 2011-02-14 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4) --no-opt --cflags
-Ic:/imagesupport/include'