HTTP/2: fix $bytes_sent variable. Previously, its value accounted for payloads of HEADERS, CONTINUATION and DATA frames, as well as frame headers of HEADERS and DATA frames, but it didn't account for frame headers of CONTINUATION frames. Signed-off-by: Piotr Sikora <piotrsikora@google.com>

make -f misc/GNUmakefile release

the required tools:
*) xsltproc to build CHANGES,
*) xslscript.pl ( http://hg.nginx.org/xslscript ) to build XSLTs
   from XSLScript sources.


make -f misc/GNUmakefile icons

the required tool:
*) netpbm to create Win32 icons from xpm sources.