Import two vendor fixes from tcsh-6.15.01 for MFC to 7.0. The fixes are:

- Fix pty detection for autologout setting
  - kill `foo` got stuck because sigchld was disabled too soon

Requested by: re

contrib/tcsh/sh.c

@@ -457,12 +457,12 @@ main(int argc, char **argv)
 	if (*cp) {
 	    /* only for login shells or root and we must have a tty */
 	    if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
-		cp = cp2 + 1;
+		cp2 = cp2 + 1;
 	    }
 	    else
 		cp2 = cp;
 	    if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
-		  ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) {
+	          Strstr(cp, STRslptssl) != NULL)) {
 		if (getenv("DISPLAY") == NULL) {
 		    /* NOT on X window shells */
 		    setcopy(STRautologout, STRdefautologout, VAR_READWRITE);

contrib/tcsh/sh.proc.c

@@ -1428,13 +1428,6 @@ pkill(Char **v, int signum)
     pid_t     pid;
     Char *cp, **vp, **globbed;
 
-    pchild_disabled++;
-    cleanup_push(&pchild_disabled, disabled_cleanup);
-    if (setintr) {
-	pintr_disabled++;
-	cleanup_push(&pintr_disabled, disabled_cleanup);
-    }
-
     /* Avoid globbing %?x patterns */
     for (vp = v; vp && *vp; vp++)
 	if (**vp == '%')
@@ -1444,6 +1437,12 @@ pkill(Char **v, int signum)
     globbed = v;
     cleanup_push(globbed, blk_cleanup);
 
+    pchild_disabled++;
+    cleanup_push(&pchild_disabled, disabled_cleanup);
+    if (setintr) {
+	pintr_disabled++;
+	cleanup_push(&pintr_disabled, disabled_cleanup);
+    }
 
     while (v && (cp = *v)) {
 	if (*cp == '%') {

contrib/tcsh/tc.const.c

@@ -46,7 +46,7 @@ Char STRautomatic[]	= { 'a', 'u', 't', 'o', 'm', 'a', 't', 'i', 'c',
 Char STRhangup[]	= { 'h', 'a', 'n', 'g', 'u', 'p', '\0' };
 Char STRaout[]		= { 'a', '.', 'o', 'u', 't', '\0' };
 Char STRtty[]		= { 't', 't', 'y', '\0' };
-Char STRpts[]		= { 'p', 't', 's', '\0' };
+Char STRslptssl[]	= { '/', 'p', 't', 's', '/', '\0' };
 Char STRany[]		= { 'a', 'n', 'y', '\0' };
 Char STRstatus[]	= { 's', 't', 'a', 't', 'u', 's', '\0' };
 Char STR0[]		= { '0', '\0' };