Add MOTD display to hgweb and hgwebdir.

Add MOTD display to hgweb and hgwebdir.

The hgweb "footer" template now has space for an optional message of
the day (MOTD). This is used in two contexts:

1) On the hgwebdir index page
2) On various pages of each individual repo

For both cases, the MOTD is read out of an entry named "motd" in the
[web] section of a config file -- the only difference is which file is
used. For #1, you need to add the section to hgweb.config; for #2, you
need to add to the repo's .hgrc file.

I suggest something like this:

[web]
motd = <p>To download these repositories, <a href="http://www.selenic.com/mercurial">get Mercurial</a> and then type something like:</p><p><pre>hg clone http://gs3080.sp.cs.cmu.edu/hg.cgi/cpmpy</pre></p>You can also click the Download links to get an archive of the latest revision.

An online sample is available here:
http://gs3080.sp.cs.cmu.edu/hg.cgi

--- a/mercurial/hgweb.py	Thu Apr 27 22:10:45 2006 -0700
+++ b/mercurial/hgweb.py	Thu Apr 27 22:11:13 2006 -0700
@@ -727,7 +727,9 @@
             yield self.t("header", **map)
 
         def footer(**map):
-            yield self.t("footer", **map)
+            yield self.t("footer",
+                         motd=self.repo.ui.config("web", "motd", ""),
+                         **map)
 
         def expand_form(form):
             shortcuts = {
@@ -1006,6 +1008,7 @@
         def cleannames(items):
             return [(name.strip(os.sep), path) for name, path in items]
 
+        self.motd = ""
         if isinstance(config, (list, tuple)):
             self.repos = cleannames(config)
         elif isinstance(config, dict):
@@ -1015,6 +1018,8 @@
             cp = ConfigParser.SafeConfigParser()
             cp.read(config)
             self.repos = []
+            if cp.has_section('web') and cp.has_option('web', 'motd'):
+                self.motd = cp.get('web', 'motd')
             if cp.has_section('paths'):
                 self.repos.extend(cleannames(cp.items('paths')))
             if cp.has_section('collections'):
@@ -1032,7 +1037,7 @@
             yield tmpl("header", **map)
 
         def footer(**map):
-            yield tmpl("footer", **map)
+            yield tmpl("footer", motd=self.motd, **map)
 
         m = os.path.join(templater.templatepath(), "map")
         tmpl = templater.templater(m, templater.common_filters,

--- a/templates/footer.tmpl	Thu Apr 27 22:10:45 2006 -0700
+++ b/templates/footer.tmpl	Thu Apr 27 22:11:13 2006 -0700
@@ -1,3 +1,4 @@
+#motd#
 <div class="logo">
 powered by<br/>
 <a href="http://www.selenic.com/mercurial/">mercurial</a>