(Info-history): Doc fix.

(Info-history): Doc fix.
(Info-history-list): New var.
(info-xref): Change magenta4 to blue, remove bold for dark and
light backgrounds, change bold to underline for non-color classes.
(info-xref-visited): New face.
(Info-fontify-visited-nodes): New custom.
(Info-hide-note-references): Add new value `hide'.  Doc fix.
(Info-reference-name): New var.
(Info-selection-hook): New custom.
(Info-edit-mode-hook): New var.
(Info-find-file): New fun.
(Info-find-node): Move part of code to Info-find-file.
(Info-find-node-2): Add anchors to Info-history-list.  Move point
to the place with the reference name if name is defined.
(Info-select-node): Add current node to Info-history-list.
(Info-goto-node): Switch to *info* from *info-history* *info-toc*.
(Info-search-whitespace-regexp): New custom.
(Info-search-case-fold): New var.
(Info-search): Add "case-sensitively" to the prompt.  Use
Info-search-whitespace-regexp.  Set Info-search-case-fold.
(Info-search-case-sensitively, Info-search-next): New fun.
(Info-up): Move point to the menu item of the current node.
(Info-history): New fun.  Add *info-history* to same-window-buffer-names.
(Info-toc): New fun.  Add *info-toc* to same-window-buffer-names.
(Info-insert-toc): New fun.
(Info-build-toc): New fun.
(Info-follow-reference): Add new arg `fork'.  Doc fix.
Replace [ \n\t]* by [ \n\t]+ in the *Note regexp.  For references
with the same name prefer the reference closest to point.
(Info-next-reference): Replace * by + in the *Note regexp.
Add regexp for http:// and ftp://.  Skip the *Note prefix.
(Info-prev-reference): Replace * by + in the *Note regexp.
Add regexp for http:// and ftp://.  Skip the *Note prefix.
(Info-follow-nearest-node): Add new arg `fork'.
(Info-try-follow-nearest-node): Add new arg `fork'.
Call browse-url for http:// and ftp:// references.
Set Info-reference-name for index entries.
(Info-mode-menu): Add menu items for Info-search-case-sensitively,
Info-search-next, Info-history, Info-toc, clone-buffer.
(Info-menu-update): Replace * by + in the *Note regexp.
(Info-mode): Add documentation for Info-history, Info-toc,
Info-search-case-sensitively, Info-search-next, clone-buffer.
(Info-fontify-menu-headers): Remove fun.  Move code to
Info-fontify-node.
(Info-fontify-node): Add docstring.  Add local vars
fontify-visited-p and not-fontified-p.  If not-fontified-p is t
then fontify header line, titles, menu headers, http and ftp
references, refill paragraphs.  If not-fontified-p is t or
fontify-visited-p is t then fontify cross references, menu items.
Fontify menu headers.  Fontify http and ftp references.  Change
regexp for cross references to require whitespace after *Note, add
matching groups for file and node names.  Remove hack for quote.
Use display property for Info-hide-note-references=t.  Use fifth
or fourth match for help-echo.  Display visited nodes in a
different face.  Unhide file names of external references.  Unhide
newlines.  Display visited menu items in a different face.