Tweak enc2xs to follow symlinks and ignore missing @INC directories.

Bug-Debian: http://bugs.debian.org/290336

- ignore missing directories,
- follow symlinks (/usr/share/perl/5.8 -> 5.8.4).
- filter "." out when running "enc2xs -C", it's unnecessary and causes
  issues with follow => 1 (see #603686 and [rt.cpan.org #64585])

Gbp-Pq: Topic debian
Gbp-Pq: Name enc2xs_inc.diff

cpan/Encode/bin/enc2xs

@@ -1013,11 +1013,11 @@ use vars qw(
 sub find_e2x{
     eval { require File::Find; };
     my (@inc, %e2x_dir);
-    for my $inc (@INC){
+    for my $inc (grep -d, @INC){
     push @inc, $inc unless $inc eq '.'; #skip current dir
     }
     File::Find::find(
-         sub {
+         { wanted => sub {
          my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
              $atime,$mtime,$ctime,$blksize,$blocks)
              = lstat($_) or return;
@@ -1027,7 +1027,7 @@ sub find_e2x{
              $e2x_dir{$File::Find::dir} ||= $mtime;
          }
          return;
-         }, @inc);
+         }, follow => 1}, @inc);
     warn join("\n", keys %e2x_dir), "\n";
     for my $d (sort {$e2x_dir{$a} <=> $e2x_dir{$b}} keys %e2x_dir){
     $_E2X = $d;
@@ -1091,7 +1091,7 @@ sub make_configlocal_pm {
 	    $LocalMod{$enc} ||= $mod;
 	}
     };
-    File::Find::find({wanted => $wanted}, @INC);
+    File::Find::find({wanted => $wanted, follow => 1}, grep -d && !/^\./, @INC);
     $_ModLines = "";
     for my $enc ( sort keys %LocalMod ) {
         $_ModLines .=

t/porting/customized.t

@@ -108,8 +108,11 @@ foreach my $module ( sort keys %Modules ) {
       print $data_fh join(' ', $module, $file, $id), "\n";
       next;
     }
+SKIP: {
+    skip("$file modified for Debian", 1) if $file eq 'cpan/Encode/bin/enc2xs';
     my $should_be = $customised{ $module }->{ $file };
     is( $id, $should_be, "SHA for $file matches stashed SHA" );
+}
   }
 }