mhttpd mime types

[dd1]

the list of mime types in mhttpd is very short. we should use the list from mongoose or let users add their own mime types in ODB. K.O.

[dd1]

cannot use the mime types list from mongoose 6.16 as it requires enabling MG_ENABLE_FILESYSTEM, and I do not want to do this. K.O.

[dd1]

added some more mime types from mongoose.c. still want to read mime types from ODB. branch feature/mongoose616. K.O.

[dd1]

commit c2c3830. K.O.