http://werc.cat-v.org/apps/blagh/ patch link was broken. So I rewrote it

blagh-conf_max_lines_per_post.diff

diff --git a/apps/blagh/app.rc b/apps/blagh/app.rc
index 71bcef6..5707ccd 100644
--- a/apps/blagh/app.rc
+++ b/apps/blagh/app.rc
@@ -10,6 +10,9 @@ fn conf_enable_blog {
 
     if(~ $"conf_max_posts_per_page '')
         conf_max_posts_per_page=32
+    
+    if(~ $"conf_max_lines_per_post '')
+        conf_max_lines_per_post=10
 }
 
 fn blagh_init {
@@ -77,7 +80,7 @@ fn blagh_body {
     { # XXX Not sure why this fixes issues with blog setup, probably bug in fltr_cache!
     for(p in `{get_post_list $blagh_root^$blagh_dirs}) {
         l=`{echo -n $p|sed 's!'$sitedir^'/?(.*)([0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9])(/[^/]+/)!\2 /\1\2\3!'}
-        sed '1s!.*![&]('^$l(2)^') ('^$l(1)^')!' < $p/index.md 
+        sed '1s!.*![&]('^$l(2)^') ('^$l(1)^')!' < $p/index.md | head -n $conf_max_lines_per_post
         echo # Needed extra \n so markdown doesn't mess up the formatting, probably can be done in sed.
     }
     # XXX BUG! Markdown [references] break because multiple markdown documents are merged. Should format each blog post independently.