so that paths and filename are writable by asterisk.c without
causing segfaults.

This involves defining the variables as const char *,
and having them point to as static, writable buffer
defined in asterisk.c

On passing, fix some errors in using these variables
in some files in utils/ , and in res/snmp/agent.c
which was redefining a variable without using paths.h

(not applicable to 1.4)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@94168 65c4cc65-6c06-0410-ace0-fbb531ad65f3