Fix some FOP warnings

Examples overflowing the width of PDF pages have been fixed.

The remaining warnings are due to table cells, and require more
work.
Implement ./otp_build configure --enable-silent-rules

With silent rules, the output of make is less verbose and compilation
warnings are easier to spot. Silent rules are disabled by default and
can be disabled or enabled at will by make V=0 and make V=1.
inets - httpc_SUITE: add redirect tests for response 303

httpc contains code for redirecting http response
301, 302, 303, and 307, but no tests existed for
response '303 See Other'. Added tests (get, head, and post)
for 303 and renumbered tests for 307. The subtle thing is that
for 303 also post requests *should* be redirected.

Also added the necessary 303 page to the dummy_server.
inets: fix autoredirect for POST requests responding 303

Changed httpc_response, for redirect '303 See Other' also POST
requests should be redirected (using GET). See RFC2616 sect. 10.3.4
for clarification.
Merge branch 'nox/enable-silent-rules/OTP-10726'

* nox/enable-silent-rules/OTP-10726:
  Implement ./otp_build configure --enable-silent-rules
inets: Prepare for R16
Merge branch 'hsv/http_redirect_on_post_303/OTP-10765'

* hsv/http_redirect_on_post_303/OTP-10765:
  inets: fix autoredirect for POST requests responding 303
  inets - httpc_SUITE: add redirect tests for response 303
[inets] Appup test suite now handles version REs
Update copyright years
Merge branch 'bmk/inets/prepare-for-release'
Prepare release