Truncation detection in sendfile() on Linux. This addresses connection hangs as observed in ticket #504, and CPU hogs with "aio threads; sendfile on" as reported in the mailing list, see http://mailman.nginx.org/pipermail/nginx-ru/2016-March/057638.html. The alert is identical to one used on FreeBSD.

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#