[perl #120903] perlcall cleanup

- linkify references to sections

- use EXTEND(SP, n) and PUSHs() instead of XPUSHs() where applicable
  and update prose to match

- add POPu, POPul and POPpbytex to the "complete list of POP macros"
  and clarify the documentation for some of the existing entries, and
  a note about side-effects

- add API documentation for POPu and POPul

- use ERRSV more efficiently

- approaches to thread-safety storage of SVs.

- minor updates

1 files changed, 6 insertions, 0 deletions

diff --git a/pp.h b/pp.h
index 828b7a2820..190b999cda 100644
--- a/pp.h
+++ b/pp.h
@@ -113,9 +113,15 @@ Pops a double off the stack.
 =for apidoc Amn|IV|POPi
 Pops an integer off the stack.
 
+=for apidoc Amn|UV|POPu
+Pops an unsigned integer off the stack.
+
 =for apidoc Amn|long|POPl
 Pops a long off the stack.
 
+=for apidoc Amn|long|POPul
+Pops an unsigned long off the stack.
+
 =cut
 */