GitLab

These should probably really be done by asio.hpp

Replaced with IOFetch with a protocol selection of UDP.

IOFetch is a general upstream "fetch" class that should be able to
operate over TCP or UDP.  Related changes have been made in the
associated classes.  So far, only the unit tests for a UDP fetch
have been made (and passed).

Updated function names to match convention.  Also added receiveComplete()
to prepare for the fact that a TCP receive may require multiple reads
before the complete message is read.

Admin tasks:
* Split out io_error.h from asiolink.h
* Made test files follow naming convention of main files
* More discriminatory includes in some files
* Updates tests/Makefile.am

Coding tasks:
* Add additional methods to io_socket.* and put in dummies in
  {tcp,udp}_socket.h
* Incorporated basic IO Fetch code from Scott

Conflicts:
	src/lib/asiolink/Makefile.am
	src/lib/asiolink/asiolink.cc
	src/lib/asiolink/internal/udpdns.h
	src/lib/asiolink/tests/udp_query_unittest.cc
	src/lib/asiolink/udpdns.cc

The test directory now contains test files that used to be in internal/ (where the makefile did have this addition)

and removed empty top level file

Though most of the tests fell into recursive_query_unittest.cc

and moved them out of internal. Changed the internal/ workaround (to prevent files outside of asiolink/ to indirectly include asio.hpp), the .cc files that include the relevant headers must include asio.hpp themselves (and this is checked in the headers)
Also moved coroutine out of internal.
Tests are still todo (which is why internal/ still exists)

asiolink.h is now merely a 'collection' header that includes all the
rest

Small fix, skipping review

as to copySection, it's now called appendSection, and works the other
way around (i.e. it copies from a source message into the object,
instead of copying from the object to a target message), which feels
more natural

Checks that we don't reject synthesized name of the maximum length by
mistake.

note: qtype_is_any was originally const, and was temporarily changed to
mutable.  it's now immutable again.

as discussed on jabber.