Ensured various XPG7 stuff are declared properly in sys/stat.h (and cleanup)
New documentation for wcslen, wcsnlen, wcscasecmp (and friends), wcsdup.
Various other tweaks and markup improvements.

*** 26,35 ****
--- 26,37 ----
  
  MANCHECKS=      $(MANFILES:%=%.check)
  ROOTMANFILES=   $(MANFILES:%=$(ROOTMAN)/man$(MANSECT)/%)
  ROOTMANLINKS=   $(MANLINKS:%=$(ROOTMAN)/man$(MANSECT)/%)
  
+ all:
+ 
  $(ROOTMAN)/man$(MANSECT)/% $(ROOTHASMAN)/man$(MANSECT)/%: %
                  $(INS.file)
  
  $(MANCHECKS):
                  @$(ECHO) "checking $(@:%.check=%)"; \
*** 39,50 ****
                  $(RM) $@; $(SYMLINK) $(LINKSRC) $@
  
  $(ROOTMANLINKS): $(MANLINKS)
                  $(RM) $@; $(CP) -RP $(@F) $(@D)
  
- all:
- 
  check:          $(MANCHECKS)
  
  clean:
  
  clobber:
--- 41,50 ----