Enable red5 tests only if curl supports RTMP.
Remove useless include
Simplify SharedLib loading code
Do not allow builds with visibility _and_ extensions enabled

Extensions wouldn't work with visibility enabled (see #36642)
Indent only fix
Tabs to spaces
typo in a comment
Add thumbnailer built files to gitignore.
Add built manpages to gitignore.
Rename curl_adapter.cpp to NetworkAdapter.cpp.
Found out how to use [quotes] for optional switch args: quadrigraphs!

Also fixes indenting of help string for --enable-http-testsuite,
--enable-red5-testing and --enable-rtmpy-testing.
reenable the delay factor
Merge branch 'master' of git.sv.gnu.org:/srv/git/gnash

Merge from upstream.
Fix cppcheck "Ineffective call" report (patch #8226)

Signed-off-by: Sandro Santilli <strk@keybit.net>
Fix infinite loop in GC mark phase for XML objects (bug #40440)

Includes testcase