no doc string for tag functions and variables

["Drew Adams" <drew.adams@oracle.com>]

The following functions and variables in etags.el have no doc
strings. Please provide doc strings, perhaps using their comments.
 
initialize-new-tags-table
tags-table-extend-computed-list
tags-expand-table-name
tags-table-list-member
tags-table-including
tags-next-table
tags-completion-table
tags-complete-tag
find-tag-tag
find-tag-interactive
find-tag-history
tag-lines-already-matched
find-tag-in-order
tag-find-file-of-tag-noselect
tag-find-file-of-tag
etags-recognize-tags-table
etags-file-of-tag
etags-tags-completion-table
etags-snarf-tag
etags-goto-tag-location
etags-list-tags
etags-tags-apropos
etags-tags-table-files
etags-tags-included-tables
tags-recognize-empty-tags-table
tag-exact-file-name-match-p
tag-file-name-match-p
tag-exact-match-p
tag-implicit-name-match-p
tag-symbol-match-p
tag-word-match-p
tag-partial-file-name-match-p
tag-any-match-p
tag-re-match-p
tags-complete-tags-table-file
select-tags-table-mode-map
 
In GNU Emacs 22.1.90.1 (i386-mingw-nt5.1.2600)
 of 2008-01-30 on PRETEST
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'