* text2latex.py: call main() instead of always processing ext.tex.

* Makefile: added 'ext' to 'all' target
* ext.tex: more changes towards a readable text
* lib4.tex (posix): added set{uid,gid}
* lib2.tex (array): restored doc for typecode and itemsize (which were
  there but not visible for dir())

Doc/text2latex.py

@@ -52,5 +52,4 @@ def process(fi, fo):
 				  '\\\\code{\\0}', line)
 		fo.write(line)
 
-#main()
-process(open('ext.tex', 'r'), sys.stdout)
+main()