netresolv: Remove or disable unused variables

Fixes #12746.

src/kits/network/netresolv/Jamfile

@@ -22,7 +22,8 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 		{
 			# we want to have the xxx_r functions, IPv6, and md5 implementation
 			# we also need to use our BSD compatibility functions
-			local defines = _REENTRANT=1 USE_MD5=1 _BSD_SOURCE INET6 ;
+			# and enable "lint" to remove the RCSID from all the files.
+			local defines = _REENTRANT=1 USE_MD5=1 _BSD_SOURCE INET6 lint LINT ;
 			defines = [ FDefines $(defines) ] ;
 			SubDirCcFlags $(defines) -Wno-sign-compare ;
 			SubDirC++Flags $(defines) -Wno-sign-compare ;

src/kits/network/netresolv/resolv/res_init.c

@@ -131,8 +131,6 @@ static uint32_t net_mask __P((struct in_addr));
 # define isascii(c) (!(c & 0200))
 #endif
 
-static const struct timespec ts = { 0, 0 };
-
 /*
  * Resolver state default settings.
  */

src/kits/network/netresolv/resolv/res_send.c

@@ -174,7 +174,9 @@ static int		pselect(int, void *, void *, void *,
 #endif
 void res_pquery(const res_state, const u_char *, int, FILE *);
 
+#ifdef DEBUG
 static const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
+#endif
 
 /* Public. */