INSTALL: document IO::Compress::Gzip dependency

Otherwise folks won't get downloadable mboxes

diff --git a/INSTALL b/INSTALL
index 14126d58cc0b109d4661d919443a84092e70c9af..2bd2eca1f694634a6d333677ee7c14d0d9909d81 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -41,6 +41,7 @@ Optional modules:
   - URI::Escape[1]             liburi-perl
   - XML::Atom::SimpleFeed[1]   libxml-atom-simplefeed-perl
   - Search::Xapian[3]          libsearch-xapian-perl
+  - IO::Compress::Gzip[3]      libio-compress-perl
 
 [1] - Only required for serving/generating Atom and HTML pages.
 [2] - Keep in mind this will be split into a separate Debian package