Point to the typical missing package, not the cryptic "termcap support".

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@235572 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 214517 .
+# From configure.ac Revision: 225957 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.4.
 #
@@ -31297,8 +31297,8 @@ elif test "x$CURSES_LIB" != "x" ; then
 elif test "x$NCURSES_LIB" != "x" ; then
   EDITLINE_LIB="$NCURSES_LIB"
 else
-  { { echo "$as_me:$LINENO: error: *** termcap support not found" >&5
+  { { echo "$as_me:$LINENO: error: *** termcap support not found (on modern Linux, this typically means libncurses5-devel is missing)" >&5
-echo "$as_me: error: *** termcap support not found" >&2;}
+echo "$as_me: error: *** termcap support not found (on modern Linux, this typically means libncurses5-devel is missing)" >&2;}
    { (exit 1); exit 1; }; }
 fi
 

configure.ac

@@ -1606,7 +1606,7 @@ elif test "x$CURSES_LIB" != "x" ; then
 elif test "x$NCURSES_LIB" != "x" ; then
   EDITLINE_LIB="$NCURSES_LIB"
 else
-  AC_MSG_ERROR(*** termcap support not found)
+  AC_MSG_ERROR([*** termcap support not found (on modern systems, this typically means libncurses5-dev is missing)])
 fi
 AC_SUBST(EDITLINE_LIB)