Update typedefs with /lib info.

src/tools/pgindent/README

@@ -11,7 +11,7 @@ symbols.
 
 From the top directory, run:
 
-  find . -name '*.[ch]' -type f -print | egrep -v '\+\+|s_lock.h' | xargs -n100 pgindent
+  find . -name '*.[ch]' -type f -print | grep -v 's_lock.h' | xargs -n100 pgindent
 
 The stock BSD indent has two bugs.  First, a comment after the word 'else'
 causes the rest of the file to be ignored.  Second, it silently ignores