The p58x25826s_59x26052.pat.bz2 is a bzip2-compressed patch (diff
-ruN) for Symbian Perl against the Perl 5.8.x sources as of 5.8.x
patch level 25826 (and as of 5.9.x patch level 26052). Since the
Symbian patch breaks binary compatibility, it will not be integrated
into the official 5.8.x branch, but the patch is supplied nevertheless,
in case someone wants to build a Perl 5.8.x for Symbian. On the 5.9.x
side, the required changes have been integrated to the official code.