bugfix: z is a letter too

src/url_canon_etc.cc

Index: src/url_canon_etc.cc
===================================================================
--- src/url_canon_etc.cc	(revision 102)
+++ src/url_canon_etc.cc	(working copy)
@@ -102,7 +102,7 @@
 // valid character, but it's only called once per URL, and it makes the lookup
 // table easier to read not having extra stuff in it.
 inline bool IsSchemeFirstChar(unsigned char c) {
-  return (c >= 'a' && c < 'z') || (c >= 'A' && c < 'Z');
+  return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
 }
 
 template<typename CHAR, typename UCHAR>