Delete the unnecessary ERR and ERRC lines in makefiles, add some functionality

to error code script: it can now find untranslatable function codes (usually
because the function is static and not defined in a header: occasionally because
of a typo...) and unreferenced function and reason codes. To see this try:
perl util/mkerr.pl -recurse -debug
Also fixed some typos in crypto/pkcs12 that this found :-)
Also tidy up some error calls that had to be all on one line: the old error
script couldn't find codes unless the call was all on one line.

CHANGES

@@ -13,7 +13,8 @@
      aren't needed for error creation any more) and do a better job of
      translating function codes into names. The old 'ASN1 error code imbedded
      in a comment' is no longer necessary and it doesn't use .err files which
-     have now been deleted.
+     have now been deleted. Also the error code call doesn't have to appear all
+     on one line (which resulted in some large lines...).
      [Steve Henson]
 
   *) Change #include filenames from <foo.h> to <openssl/foo.h>.