bpo-43774: Document configure options (GH-25283)

Add Doc/using/configure.rst documentation to document configure,
preprocessor, compiler and linker options.

Add a new section about the "Python debug build".
diff --git a/Doc/howto/instrumentation.rst b/Doc/howto/instrumentation.rst
index f0081e4..ab6240d 100644
--- a/Doc/howto/instrumentation.rst
+++ b/Doc/howto/instrumentation.rst
@@ -266,7 +266,7 @@
 
    probe process("python").library("libpython3.6dm.so.1.0").mark("function__entry") {
 
-(assuming a debug build of CPython 3.6)
+(assuming a :ref:`debug build <debug-build>` of CPython 3.6)
 
 
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