[PATCH] Core: fix ngx_module_t

[Piotr Sikora]

# HG changeset patch
# User Piotr Sikora <piotrsikora at google.com>
# Date 1455064286 28800
#      Tue Feb 09 16:31:26 2016 -0800
# Node ID 4589af8229973093d3287fc3747e1a5245eaaf59
# Parent  50770821c184a79f3da1707c15e6c835a3596b97
Core: fix ngx_module_t.

Changes to NGX_MODULE_V1 and ngx_module_t in 85dea406e18f (1.9.11)
broke all modules written in C++, because ISO C++11 does not allow
conversion from string literal to char *.

Signed-off-by: Piotr Sikora <piotrsikora at google.com>

diff -r 50770821c184 -r 4589af822997 src/core/ngx_module.h
--- a/src/core/ngx_module.h
+++ b/src/core/ngx_module.h
@@ -253,7 +253,7 @@ struct ngx_module_s {
     ngx_uint_t            spare1;
 
     ngx_uint_t            version;
-    char                 *signature;
+    const char           *signature;
 
     void                 *ctx;
     ngx_command_t        *commands;