[w3m-dev 03501] link tag support

* buffer.c (reshapeBuffer): initialize formlist, linklist,
				maplist, hmarklist, imarklist
* file.c (addLink): added
	(HTMLlineproc2body): add HTML_LINK
	(loadHTMLstream): use HTMLlineproc0 not in R_ST_NORMAL
	(reloadBuffer): initialize linklist, maplist,
			hmarklist, imarklist
* fm.h (LINK_TYPE_NONE): added
	(LINK_TYPE_REL): added
	(LINK_TYPE_REV): added
	(LinkList): added
	(Buffer): add linklist
* html.c (ALST_LINK): added
	(TagMAP): add link
	(AtrMAP): add rel, rev, title
* html.h (HTML_LINK): added
	(ATTR_REL): added
	(ATTR_REV): added
	(ATTR_TITLE): added
* map.c (append_map_info): anchor
	(append_link_info): added
	(page_info_panel): append_link_info
* menu.c (LinkMenu): added
	(linkV): added
	(initLinkMenu): added
	(lmGoURL): added
	(popupMenu): initLinkMenu()
	(initMenu): w3mMenuList new 4
			add "Link"
* tagtable.tab (link): added
From: Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>

tagtable.tab

@@ -117,6 +117,7 @@ style		HTML_STYLE
 wbr		HTML_WBR
 head           HTML_HEAD
 /head          HTML_N_HEAD
+link           HTML_LINK
 body		HTML_BODY
 /body		HTML_N_BODY
 html		HTML_BODY