[pulseaudio-discuss] Allow conditionals in config input files

[Maarten Bosmans]

This patch series changes the current use of sed by an awk script, with some enhancements on top.
It is portable, or at least I've tested it with both gawk and mawk and it passes make distcheck.

[PATCH 1/6] build: Replace sed by awk for processing .in files
[PATCH 2/6] build: Get rid of default.pa.win32
[PATCH 3/6] build: Use more conditional inclusions in default.pa
[PATCH 4/6] build: Only use relevant portions of daemon.conf.in
[PATCH 5/6] Move -Ddefines from AM_CFLAGS to config.h
[PATCH 6/6] Make pulse compile with clang

The series is online at https://github.com/mkbosmans/pulseaudio/compare/build-system for ease of merging.
Note that the last patch in the series is not really related, but is included as a reminder to merge.

I'm happy to receive further comments.  In particular I'd like to invite Colin to show whether his proposed approach
using .include and a /etc/pulse/subdir is a viable alternative to this patch series.

Maarten