Note that certain flags are documented

This is useful in Devel::PPPort for generating its api-info data.  That
useful feature of D:P allows someone to find out what was the first
release of Perl to have a function, macro, or flag.  And whether using
ppport.h backports it further.

I went through apidoc.pod and looked for flags that were documented but
that D:P didn't know about.  This commit adds entries for each so that
D:P can find them.

1 files changed, 2 insertions, 0 deletions

diff --git a/hv.c b/hv.c
index d34a79be77..eccae6294c 100644
--- a/hv.c
+++ b/hv.c
@@ -2672,6 +2672,8 @@ C<&PL_sv_placeholder>.  Note that the implementation of placeholders and
 restricted hashes may change, and the implementation currently is
 insufficiently abstracted for any change to be tidy.
 
+=for apidoc Amnh||HV_ITERNEXT_WANTPLACEHOLDERS
+
 =cut
 */