Added minimal support for LTDL_LIBRARY_PATH with MSVC plugins. Only one path
is supported for now (TODO: add support for a path list similar to ltdl).
Fixed documentation for LTDL_LIBRARY_PATH (Windows path separator).


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11937 6c8e4198-a580-4521-a02f-c9ae86df1db9