bug#19629: 25.0.50; Index `follow-link' text property in Elisp manual

[Drew Adams]

`follow-link (button property)' appears in the Index.  But `follow-link
(text property)' does not.  It should, with a target of node `Clickable
Text'.

`Clickable Text', not `Button Properties', is the main node where
property `follow-link' is described.

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'