xterm: Remove ability to restore console after man, less, etc.

Having a man page disappear before the read the end (if it indeed appears
at all) is pretty annoying.  Equally annoying is using the "more" command
on a file with few lines only to see nothing.  The default behavior of
xterm console had few fans.

This removes the smcup and rmcup codes from xterm-basic, the basis for
the xterm console definitions.  Now man pages are left on the screen
after viewing, and the pagers work as expected.

contrib/ncurses/README.DRAGONFLY

@@ -23,3 +23,8 @@ The .h files copied into base where created using configure opts:
 
 The following files have been modified:
 	ncurses/tinfo/comp_scan.c
+	misc/terminfo.src [1]
+
+[1] smcup and rmcup were removed from xterm-basic to disable the
+    restoration of the console after less, more, man, and other
+    utilities are executed.  It was rendering them useless.

contrib/ncurses/misc/terminfo.src

@@ -3460,14 +3460,14 @@ xterm-basic|modern xterm terminal emulator - common,
 	ind=^J, invis=\E[8m, is2=\E[!p\E[?3;4l\E[4l\E>, kbs=^H,
 	kmous=\E[M, mc0=\E[i, mc4=\E[4i, mc5=\E[5i, meml=\El,
 	memu=\Em, op=\E[39;49m, rc=\E8, rev=\E[7m, ri=\EM,
-	rmacs=\E(B, rmam=\E[?7l, rmcup=\E[?1049l, rmir=\E[4l,
+	rmacs=\E(B, rmam=\E[?7l, rmir=\E[4l,
 	rmkx=\E[?1l\E>, rmm=\E[?1034l, rmso=\E[27m, rmul=\E[24m,
 	rs1=\Ec, rs2=\E[!p\E[?3;4l\E[4l\E>, sc=\E7,
 	setab=\E[4%p1%dm, setaf=\E[3%p1%dm,
 	setb=\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
 	setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
 	sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m,
-	sgr0=\E(B\E[m, smacs=\E(0, smam=\E[?7h, smcup=\E[?1049h,
+	sgr0=\E(B\E[m, smacs=\E(0, smam=\E[?7h,
 	smir=\E[4h, smkx=\E[?1h\E=, smm=\E[?1034h, smso=\E[7m,
 	smul=\E[4m, tbc=\E[3g, vpa=\E[%i%p1%dd, use=vt100+enq,