core: Don't allow free to mean ast_free (and malloc, etc..).

This gets rid of most old libc free/malloc/realloc and replaces them
with ast_free and friends. When compiling with MALLOC_DEBUG you'll
notice it when you're mistakenly using one of the libc variants. For
the legacy cases you can define WRAP_LIBC_MALLOC before including
asterisk.h.

Even better would be if the errors were also enabled when compiling
without MALLOC_DEBUG, but that's a slightly more invasive header
file change.

Those compiling addons/format_mp3 will need to rerun
./contrib/scripts/get_mp3_source.sh.

ASTERISK-24348 #related
Review: https://reviewboard.asterisk.org/r/4015/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@423978 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/scripts/get_mp3_source.sh

@@ -6,9 +6,19 @@ if [ -f addons/mp3/mpg123.h ]; then
     echo "need to be downloaded."
     echo "***"
 
+    # Manually patch interface.c if not done yet.
+    if ! grep -q WRAP_LIBC_MALLOC addons/mp3/interface.c; then
+        sed -i -e '/#include "asterisk.h"/i#define WRAP_LIBC_MALLOC' \
+            addons/mp3/interface.c
+    fi
+
     exit 1
 fi
 
 svn export http://svn.digium.com/svn/thirdparty/mp3/trunk addons/mp3 $@
 
+# Manually patch interface.c.
+sed -i -e '/#include "asterisk.h"/i#define WRAP_LIBC_MALLOC' \
+    addons/mp3/interface.c
+
 exit 0