nginx: do not reduce max processes

Use the upstream value for NGX_MAX_PROCESSES (=1024) again.
So it is safe to use `worker_processes auto;` (which sets it to
the number of CPUs). Also use this directive in the conf instead
of calculating the number in the init and passing it as argument.

Signed-off-by: Peter Stadler <peter.stadler@student.uibk.ac.at>

net/nginx/patches/300-max-processes.patch

@@ -1,11 +0,0 @@
---- a/src/os/unix/ngx_process.h
-+++ b/src/os/unix/ngx_process.h
-@@ -44,7 +44,7 @@ typedef struct {
- } ngx_exec_ctx_t;
- 
- 
--#define NGX_MAX_PROCESSES         1024
-+#define NGX_MAX_PROCESSES         8
- 
- #define NGX_PROCESS_NORESPAWN     -1
- #define NGX_PROCESS_JUST_SPAWN    -2