Caused a build failure with uClibc because snprintf() was not
available.

Fixes in-tree build when the script is called as "android/build.py"
and not "./android/build.py".

Fixes a problem with the "curl" input plugin: IsEOF() always returns
true because the "open" flag was cleared by
CurlInputStream::RequestDone() when end-of-stream was reached.  This
flag stays false even when seeking to another position has succeeded.

This patch resets the "open" flag to true after seeking successfully.

NetBSD's pthread_setname_np() prototype is incompatible with the rest
of the world, and it requires to pass the string argument as a
non-const pointer.  Instead of working around this misdesign, I hereby
disable the feature on NetBSD.

Add macro HAVE_THREAD_NAME which is set when any method to set the
thread name is available.  Use that macro in FormatThreadName()
instead of just checking for HAVE_PTHREAD_SETNAME_NP.

Return false on error, not nullptr.

New in clang 3.6.

Fixes -Winconsistent-missing-override (clang 3.6).

Return false on error, not nullptr.

Fixes -Winconsistent-missing-override (clang 3.6).

New in clang 3.6.

Here's a change to dynamically allocate the DSD ID3 tag buffer.
Pretty much anything with cover art is going to exceed the existing,
static 4k limit...  Here's a change to dynamically allocate the buffer
and sanity check it at some upper limit.  I rather arbitrarily pulled
256k out of thin air just to keep a corrupt file from causing it to
trying to allocate a buffer larger than available memory.

setvbuf() does not seem to have an effect on Windows.

Make sure everything gets logged right away.  No delays because
stdio's buffer is not yet full.

Without MEM_COMMIT, the reserved address space is not accessible, and
MPD crashes.