"Posting Guidelines": New name for old entry.

"Posting Guidelines":  New name for old entry.
"Multiple copies of DLL":  shared region corrupt error message.
"Why the weird directory structure": re-wrote for latest.
"Symlinks on Samba": fix typo.
"Where is glibc": new entry.
"HT build relocatable dll": (interim update) link to Carl Thompson's message in cygwin list.
"Can I mix msvc++ and gcc objects": remove disclaimer.