Update HTTP server

[vinc]

• Add MIME type to BMP files
• Use native newline in text content
• Use native newline in HTML content

[vinc]

HTTP/1.1 defines the sequence CR LF as the end-of-line marker for all protocol elements except the entity-body but until now the server would also convert the newlines in text files. A file created in one computer running MOROS and downloaded in another via HTTP would not have the same hash in both computer because the newlines would be different.