Merge from origin/emacs-25

43662a2 ; Clarify that xref is still experimental
0a6e6ca ; * admin/release-process: Remove some obsolete records.
c2e9e3d * lisp/progmodes/fortran.el (fortran-make-syntax-propertize-function):
8637f3d (semantic-symref-derive-find-filepatterns): Return a list
0a7ad07 ; Re-arrange xref-related entries in NEWS.
fe903ef Fix xref-find-references on MS-Windows
55a28d8 ; Fixed visual bell artifact problem on NextStep.
d064034 Document new features of tildify-mode
964bea7 Document new features of Whitespace mode
cd68f47 Improve documentation of new Hide-IfDef features
723b8bf Fix regression in font-locking cl-assert and cl-check-type

diff --cc admin/release-process
Simple merge

diff --cc etc/NEWS
Simple merge