This should solve a few problems with static vs. shared builds for extensions (such as mssql) that require certain CFLAGS to be defined, but not pull in other flags that would affect DLL linkage.

This should solve a few problems with static vs. shared builds for extensions (such as mssql) that require certain CFLAGS to be defined, but not pull in other flags that would affect DLL linkage.
Also fix the iconv file; MSVC doesn't seem to like the #include SYMBOL syntax.

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VC stores lib path in LIB not LIBS.
Add --with-extra-includes and --with-extra-libs to be able to specify
general additions to those paths from the environment.

Build adjustments.

some tweaks for Frank

avoid vs.net specific option for now

make help more useful

Clarify a little.

Add new (optional!) win32 build infrastructure.
Will follow up to internals@ shortly.