Improve code readability.
Improve OFTLSSocket protocol.
OFTLSSocket: Add support for SNI.
Fix Win32 #include hell.
Check for OBJC_NEW_PROPERTIES as a fallback.
Add support for SjLj exceptions.
Add -[OFEnumerator allObjects].
Simplify -[OFDictionary all{Keys,Objects}].

This is possible now since +[OFArray arrayWithCapacity:] has been added.
Fix incomplete of_char16_t migration.
OFXMLParser: Require version in prolog.
OFHTTPServer: Fix an evil typo.
OFXMLParser: Skip BOM.
vasprintf: Create a copy of arguments.
Fix --disable-threads.