op.h: Corrent comment about entersub strictures

Flag 2 on entersub is HINT_STRICT_REFS, not _SUBS.
[perl #117311] B::Deparse with option -l leaves formfeed characters in its output
Add Heiko Eissfeldt to AUTHORS
remove obsolete VOS special cases from eu_command.t
change DynaLoader.t to know VOS has no libc library
change svpeek.t to append the VOS executable suffix to $^X
remove an obsolete VOS special case and add a new one in fs.t
add a special case for VOS handling of file position after open in tell.t
remove an obsolete special case for VOS handling of permissions in AnyDBM_File.t
add a special case for VOS handling of argv[0] in magic.t
deparse.t: Fix test count