- copy() when collecting dependencies for static module linking
- copy() when following operations append to it and we don't reset it to
an empty list
- use autoadd = 0 for many functions to prevent modifying env[LIBS] in
the first place
- append to env[LIBS] manually to make it explicit (fam and rt)
Lack of pipe2() on relic Unix as well as missing on Mac OSX is likely
one reason why threaded web servers such as nginx choose not to support
CGI except via an external service to the process. Without pipe2(),
race conditions exist and it is not safe for a threaded server to use
pipe() and fork() when the server also does not want to potentially leak
open file descriptors to various unrelated CGI scripts.
[mod_deflate] skip deflate if 1 min loadavg too high
deflate.max-loadavg = "3.50" # express value as string of float num
[mod_compress] skip compression if 1 min loadavg too high
compress.max-loadavg = "3.50" # express value as string of float num
Feature available on BSD-like systems which have getloadavg() in libc
Note: load average calculations are different on different operating
systems and different types of system loads, so there is no value that
can be recommended for one-size-fits-all.
"Enable mod_compress to abandon compression when load average is too high"