How to regenerate the manpages
------------------------------------
1) ./configure --enable-docs --enable-refdocs --enable-htmldocs
2) make # this creates doc/SystemTap_Tapset_Reference/tapsets.xml
3) cd doc/SystemTap_Tapset_Reference
3) xmlto man tapsets.xml -o man3 # this regens the manpage content
4) ./manpager # adds the SEE ALSO sections (cross references) to the manpages
