Patches for RCS 5.5 under SCO UNIX

[Chip Salzenberg]

I just compiled RCS 5.5 under SCO UNIX.  It works very well, and the
port was simplicity itself.  Only a few tiny patches were required;
they are included below.

(I am forwarding a copy of these patches to rcs-bugs at cs.purdue.edu
and the GNU utils bug list.)

The changes were:
  In conf.sh:
     The third parameter of vfprintf() is a va_list, not "...".
     The link() and pathconf() functions need to be prototyped.
  In rcsbase.h:
     The strncmp() and strncpy() functions take a size_t, not an
        int, as their third parameters.

Patches follow.

*** conf.sh.P	Fri Jan  4 00:07:20 1991
--- conf.sh	Fri Jan 25 16:09:20 1991
***************
*** 644,648 ****
  	int printf P((const char*,...));
  #	if has_vfprintf
! 		int vfprintf P((FILE*,const char*,...));
  #	else
  		void _doprnt P((const char*,...));
--- 644,648 ----
  	int printf P((const char*,...));
  #	if has_vfprintf
! 		int vfprintf P((FILE*,const char*,va_list arg));
  #	else
  		void _doprnt P((const char*,...));
***************
*** 681,685 ****
  	'int open P((const char*,int,...));' \
  	'mode_t umask P((mode_t));' \
! 	'pid_t wait P((int*));'
  do
  	if $C -S -Ddeclaration="$declaration" a.c >&2
--- 681,687 ----
  	'int open P((const char*,int,...));' \
  	'mode_t umask P((mode_t));' \
! 	'pid_t wait P((int*));' \
! 	'int link P((const char*,const char *));' \
! 	'int sysconf P((const char*,int));'
  do
  	if $C -S -Ddeclaration="$declaration" a.c >&2
*** rcsbase.h.P	Fri Jan  4 00:07:23 1991
--- rcsbase.h	Fri Jan 25 15:55:52 1991
***************
*** 258,262 ****
  #	endif
  #	ifndef strncpy
! 		char *strncpy P((char*,const char*,int));
  #	endif
  #	ifndef strrchr
--- 258,262 ----
  #	endif
  #	ifndef strncpy
! 		char *strncpy P((char*,const char*,size_t));
  #	endif
  #	ifndef strrchr
***************
*** 267,271 ****
  #	endif
  #	ifndef strncmp
! 		int strncmp P((const char*,const char*,int));
  #	endif
  #	ifndef strlen
--- 267,271 ----
  #	endif
  #	ifndef strncmp
! 		int strncmp P((const char*,const char*,size_t));
  #	endif
  #	ifndef strlen