Build System: Replace comment about setting menuselect defaults.

The Makefile claims that you can set default menuselect options by creating
~/.asterisk.makeopts or /etc/asterisk.makeopts, but those files have never
been respected in Asterisk 11 or 13.  This changes the comment to accurately
reflect that these files are not automatically used by the build system.

ASTERISK-13721 #close
Reported by: pj

Change-Id: Ibde804ff196283def49ccb9432fbf224a22586e2

Makefile

@@ -149,14 +149,21 @@ LINKER_SYMBOL_PREFIX=
 # Uncomment this to use the older DSP routines
 #_ASTCFLAGS+=-DOLD_DSP_ROUTINES
 
-# If the file .asterisk.makeopts is present in your home directory, you can
-# include all of your favorite menuselect options so that every time you download
-# a new version of Asterisk, you don't have to run menuselect to set them.
-# The file /etc/asterisk.makeopts will also be included but can be overridden
-# by the file in your home directory.
+# This Makefile previously contained a note about the ability to use .asterisk.makeopts
+# from your home directory or /etc/asterisk.makeopts to set defaults for menuselect.
+# These files have never worked in this branch of Asterisk.  The work around is to
+# manually copy the file containing defaults before running 'make menuselect':
+#
+# cp ${HOME}/.asterisk.makeopts menuselect.makeopts
+#   or
+# cp /etc/asterisk.makeopts menuselect.makeopts
+#
+# As an alternative, menuselect/menuselect can be used by a script to enable or disable
+# individual options or entire categories.  To use this feature you must first
+# compile menuselect using 'make menuselect.makeopts'.  For information about parameters
+# supported run:
+# menuselect/menuselect --help
 
-GLOBAL_MAKEOPTS=$(wildcard /etc/asterisk.makeopts)
-USER_MAKEOPTS=$(wildcard ~/.asterisk.makeopts)
 
 MOD_SUBDIR_CFLAGS="-I$(ASTTOPDIR)/include"
 OTHER_SUBDIR_CFLAGS="-I$(ASTTOPDIR)/include"
@@ -333,10 +340,10 @@ makeopts: configure
 	@echo "****"
 	@exit 1
 
-menuselect.makeopts: menuselect/menuselect menuselect-tree makeopts build_tools/menuselect-deps $(GLOBAL_MAKEOPTS) $(USER_MAKEOPTS)
+menuselect.makeopts: menuselect/menuselect menuselect-tree makeopts build_tools/menuselect-deps
 ifeq ($(filter %menuselect,$(MAKECMDGOALS)),)
 	menuselect/menuselect --check-deps $@
-	menuselect/menuselect --check-deps $@ $(GLOBAL_MAKEOPTS) $(USER_MAKEOPTS)
+	menuselect/menuselect --check-deps $@
 endif
 
 $(MOD_SUBDIRS_EMBED_LDSCRIPT):