Document build opts for SDK vs VS better
Document enabling MSDTC tracing
Remove obsolete .bat installer creators
Remove the duplicate winbuild readme
Fix a memory leak pointed out by pluto.cobain.
Revise descriptor stuff.
descriptor.c(h) was broken by the commit
	2da1668f4c7d7871a7212db10af606a7e646abd6
and it now causes a crash bug.