doc/help localization changes

- by default, do not build any other locale than C for now
- do not try to build the guides.  These require functioning
  dtinfo/docbook
- add a Linux.lcx locale translation db.  Not used yet.
- fix some overflows in dtdocbook/instant

cde/config/cf/site.def

@@ -77,6 +77,11 @@ XCOMM site:  $TOG: site.def /main/23 1998/03/19 18:43:26 mgreess $
 # define DtLocalesToBuild ja_JP.dt-eucJP
 #endif
 
+XCOMM No locales other than C will build at this time.
+#ifdef LinuxArchitecture
+# define DtLocalesToBuild 
+#endif
+
 #ifdef SunArchitecture
 #define HasCodeCenter        YES
 #define HasTestCenter        YES