Stream: postpone session initialization under accept mutex. Previously, it was possible that some system calls could be invoked while holding the accept mutex. This is clearly wrong as it prevents incoming connections from being accepted as quickly as possible.

if exists("b:did_indent")
    finish
endif
let b:did_indent = 1

setlocal indentexpr=

" cindent actually works for nginx' simple file structure
setlocal cindent
" Just make sure that the comments are not reset as defs would be.
setlocal cinkeys-=0#