[shell changes from patch from perl5.003_19 to perl5.003_20]

[shell changes from patch from perl5.003_19 to perl5.003_20]

Change from running these commands:

 # this file is obsolete
 rm -f ext/DynaLoader/dl_os2.xs

 # this file was renamed
 if test -f t/pragma/warn-global
 then
     mv t/pragma/warn-global t/pragma/warn-1global
 fi

 # new (and nearly new) tests must be executable
 touch t/comp/proto.t
 chmod +x t/comp/proto.t t/comp/use.t t/harness

 # ready to patch
 exit 0