nnrpd.c patch for HP/UX

[Heath Kehoe]

This is needed to make nnrpd.c in the current snapshots
compile on HP/UX.

-h

*** nnrpd.c	2000/07/05 03:43:35	1.78.2.9
--- nnrpd.c	2000/07/05 16:44:46
***************
*** 34,39 ****
--- 34,43 ----
  int nnrpd_starttls_done = 0;
  #endif 
  
+ #if defined(hpux) || defined(__hpux) || defined(_SCO_DS)
+ extern int h_errno;
+ #endif
+ 
  /*
  ** Here is some defensive code to protect the news server from hosts,
  ** mostly PC's, that sometimes make a connection and then never give