Detect 0.20 API
Use 0.20 API if present
Detect libsocket and libnsl automatically
Set the right conditional, and display the right status
Cleanup backend reporting when module is loaded

Log everything at the same severity,
in the same way.
Merge pull request #1561 from cmouse/detect-socket-and-nsl-lib

Detect libsocket and libnsl automatically
Merge pull request #1566 from rubenk/cleanup-backend-reporting

Cleanup backend reporting when module is loaded
Merge pull request #1565 from rubenk/fix-remotebackend-conditional

Set the right conditional, and display the right status
Merge pull request #1559 from cmouse/fix-issue-1464

Fix issue 1464
whitespace and oracle backend reporting
Ignore makefiles

Fallout from #1560
Check that the C++ compiler actually works.

AC_PROG_CXX still sets CXX, even if it doesn't
find a working C++ compiler:

http://osdir.com/ml/bug-autoconf-gnu/2010-05/msg00002.html

This causes the Boost checks to fail.

If AC_PROG_CXX finds a working compiler, it sets the GXX shell
variable. Test for this.

Fixes #1178
--enable-remotebackend-http is gone
Merge pull request #1575 from rubenk/remove-removed-option-from-travis

--enable-remotebackend-http is gone
pdns_control and pdnssec are always built
Merge pull request #1571 from mind04/backend

whitespace and oracle backend reporting
Merge pull request #1574 from rubenk/issues/1178

Check that the C++ compiler actually works.
Merge pull request #1572 from rubenk/ignore-makefiles

Ignore makefiles
Remove -fPIC from CFLAGS

Libtool libraries are always position independent
These flags are for the C preprocessor