godoc: implemented command-line search

The command-line search is using a running webserver
as index server; i.e., the search result is reflecting
the index at the server. See the documentation for
details.

Usage: godoc -q query1 query2 ...

Known issue: Results don't show the all-important
line numbers yet due to the way the index is organized.
Next CL.

R=rsc, r
CC=golang-dev
http://codereview.appspot.com/648041

1 files changed, 52 insertions, 0 deletions

diff --git a/lib/godoc/search.txt b/lib/godoc/search.txt
new file mode 100644
index 000000000..9ae98d5b4
--- /dev/null
+++ b/lib/godoc/search.txt
@@ -0,0 +1,52 @@
+QUERY = {Query}
+
+{.section Accurate}
+{.or}
+INDEXING IN PROGRESS - RESULT MAY BE INACCURATE
+
+{.end}
+{.section Alt}
+DID YOU MEAN
+{.repeated section Alts}
+	{@}
+{.end}
+
+{.end}
+{.section Hit}
+{.section Decls}
+PACKAGE-LEVEL DECLARATIONS
+
+{.repeated section @}
+package {Pak.Name}
+{.repeated section Files}
+{.repeated section Groups}
+{.repeated section Infos}
+	{File.Path|url-src}
+{.end}
+{.end}
+{.end}
+
+{.end}
+{.end}
+{.section Others}
+LOCAL DECLARATIONS AND USES
+
+{.repeated section @}
+package {Pak.Name}
+{.repeated section Files}
+{.repeated section Groups}
+{.repeated section Infos}
+	{File.Path|url-src}
+{.end}
+{.end}
+{.end}
+
+{.end}
+{.end}
+{.end}
+{.section Illegal}
+ILLEGAL QUERY SYNTAX
+
+A legal query is a single identifier (such as ToLower)
+or a qualified identifier (such as math.Sin).
+{.end}