hgweb: add searchhint to templates/coal/map
coal style uses every template (except header.tmpl) directly from paper style,
but doesn't use paper/map file. Elements defined in such map files are used in
templates as you would expect. For example, paper/search.tmpl contains
'{searchhint}' and template engine replaces that with the actual hint. But when
coal style reuses paper/search.tmpl, it needs to define searchhint in its map
file as well, or template engine will not find it. So let's copy it from
paper/map to coal/map.
Before this change, if the coal style was selected, the hint for the search
field in page header was present, but it was completely empty. Although the
absence of searchhint in coal/map produced no error.
$ hg init repo
$ cd repo
$ touch foo
$ hg ci -Am 'add foo'
adding foo
$ hg up -C null
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
this should be stored as a delta against rev 0
$ echo foo bar baz > foo
$ hg ci -Am 'add foo again'
adding foo
created new head
$ hg debugindex foo
rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 0 ..... 0 b80de5d13875 000000000000 000000000000 (re)
1 0 13 ..... 1 0376abec49b8 000000000000 000000000000 (re)
$ cd ..