Patch by Niko Tyni <ntyni@iki.fi> for perl-CGI-SpeedyCGI >= 2.22, which allows empty strings as
command-line parameters.

--- CGI-SpeedyCGI-2.22/src/speedy_frontend.c			2003-10-07 06:03:48.000000000 +0200
+++ CGI-SpeedyCGI-2.22/src/speedy_frontend.c.empty_param	2008-05-04 20:19:05.000000000 +0200
@@ -540,6 +540,27 @@
     ADDCHAR(b, 0);
 }
 
+/* Copy a block of strings into the buffer, including empty strings */
+static void add_strings_with_empty(register SpeedyBuf *b, register const char * const * p)
+{
+    int l;
+    register const char *s;
+
+    /* Add strings in p array */
+    for (; (s = *p); ++p) {
+	if ((l = strlen(s))) {
+	    ADD_STRING(b, s, l);
+	} else {
+	    /* add a 1-byte long string containing just '\0' */
+	    l = 1;
+	    ADD_STRING(b, s, l);
+	}
+    }
+
+    /* Terminate with zero-length string */
+    ADDCHAR(b, 0);
+}
+
 void speedy_frontend_mkenv(
     const char * const * envp, const char * const * scr_argv, int min_alloc,
     SpeedyBuf *sb, int script_has_cwd
@@ -560,7 +581,7 @@
 
     /* Add env and argv */
     add_strings(sb, envp);
-    add_strings(sb, scr_argv+1);
+    add_strings_with_empty(sb, scr_argv+1);
 
     /* Put script filename into buffer */
     add_string(sb, script_fname, strlen(script_fname));