* Use GNU readline as our base readline lacks rl_prefer_env_winsize

Index: configure
--- configure.orig
+++ configure
@@ -82716,21 +82716,21 @@ fi
             case "$found_dir" in
               */$acl_libdirstem | */$acl_libdirstem/)
                 basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
-                if test "$name" = 'readline'; then
+                if test "$name" = 'ereadline'; then
                   LIBREADLINE_PREFIX="$basedir"
                 fi
                 additional_includedir="$basedir/include"
                 ;;
               */$acl_libdirstem2 | */$acl_libdirstem2/)
                 basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem2/"'*$,,'`
-                if test "$name" = 'readline'; then
+                if test "$name" = 'ereadline'; then
                   LIBREADLINE_PREFIX="$basedir"
                 fi
                 additional_includedir="$basedir/include"
                 ;;
               */$acl_libdirstem3 | */$acl_libdirstem3/)
                 basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem3/"'*$,,'`
-                if test "$name" = 'readline'; then
+                if test "$name" = 'ereadline'; then
                   LIBREADLINE_PREFIX="$basedir"
                 fi
                 additional_includedir="$basedir/include"
@@ -82950,8 +82950,8 @@ fi
   done
 
 
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for readline" >&5
-printf %s "checking for readline... " >&6; }
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ereadline" >&5
+printf %s "checking for ereadline... " >&6; }
 if test ${gl_cv_lib_readline+y}
 then :
   printf %s "(cached) " >&6
@@ -83014,8 +83014,8 @@ printf "%s\n" "#define HAVE_READLINE 1" >>confdefs.h
       LIBREADLINE="$LIBREADLINE $extra_lib"
       LTLIBREADLINE="$LTLIBREADLINE $extra_lib"
     fi
-    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libreadline" >&5
-printf %s "checking how to link with libreadline... " >&6; }
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking how to link with libereadline" >&5
+printf %s "checking how to link with libereadline... " >&6; }
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $LIBREADLINE" >&5
 printf "%s\n" "$LIBREADLINE" >&6; }
   else
@@ -93230,7 +93230,7 @@ printf "%s\n" "$as_me: WARNING: $warn_rapidjson" >&2;}
 
 fi
 
-### Check for readline library.
+### Check for ereadline library.
 
 
   USE_READLINE=yes
@@ -93316,7 +93316,7 @@ fi
   rpathdirs=
   ltrpathdirs=
   names_already_handled=
-  names_next_round='readline '
+  names_next_round='ereadline '
   while test -n "$names_next_round"; do
     names_this_round="$names_next_round"
     names_next_round=
