Make --with-pjproject-bundled the default for Asterisk 15

'--with-pjproject-bundled' is now the default when running
./configure. It can be disabled with '--without-pjproject-bundled'.

To make building without an internet connection easier, a new
./configure option '--with-download-cache' was added that sets
the cache for externals (like pjproject, the codecs and the DPMA),
AND the sounds files.  It can also be specified as an environment
variable named "AST_DOWNLOAD_CACHE".  The existing
'--with-sounds-cache' option / SOUNDS_CACHE_DIR env variable and
'--with-externals-cache' option / EXTERNALS_CACHE_DIR env variable
remain and if specified, will override '--with-downloads-cache'.

ASTERISK-27189

Change-Id: Ifa9783fddf44aafadb060c9feba713dfa81d38ce

configure

@@ -1228,6 +1228,7 @@ AST_NESTED_FUNCTIONS
 AST_CODE_COVERAGE
 EXTERNALS_CACHE_DIR
 SOUNDS_CACHE_DIR
+AST_DOWNLOAD_CACHE
 AST_DEVMODE_STRICT
 AST_DEVMODE
 NOISY_BUILD
@@ -1381,6 +1382,7 @@ ac_user_opts='
 enable_option_checking
 with_gnu_ld
 enable_dev_mode
+with_download_cache
 with_sounds_cache
 with_externals_cache
 enable_coverage
@@ -2128,12 +2130,15 @@ Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
+  --with-download-cache=PATH
+                          use cached sound AND external module tarfiles in
+                          PATH
   --with-sounds-cache=PATH
                           use cached sound tarfiles in PATH
   --with-externals-cache=PATH
                           use cached external module tarfiles in PATH
   --with-pjproject-bundled
-                          Use bundled pjproject libraries
+                          Use bundled pjproject libraries (default)
   --with-asound=PATH      use Advanced Linux Sound Architecture files in PATH
   --with-bfd=PATH         use Debug symbol decoding files in PATH
   --with-execinfo=PATH    use Stack Backtrace files in PATH
@@ -9055,6 +9060,30 @@ fi
 
 
 
+# Check whether --with-download-cache was given.
+if test "${with_download_cache+set}" = set; then :
+  withval=$with_download_cache;
+	case ${withval} in
+	n|no)
+		unset AST_DOWNLOAD_CACHE
+		;;
+	*)
+		if test "x${withval}" = "x"; then
+			:
+		else
+			AST_DOWNLOAD_CACHE="${withval}"
+		fi
+		;;
+	esac
+
+else
+  :
+fi
+
+
+
+
+
 # Check whether --with-sounds-cache was given.
 if test "${with_sounds_cache+set}" = set; then :
   withval=$with_sounds_cache;
@@ -9254,7 +9283,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 	CFLAGS="$save_CFLAGS"
 
 
-PJPROJECT_BUNDLED=no
+PJPROJECT_BUNDLED=yes
 
 
 
@@ -9317,11 +9346,11 @@ $as_echo "configuring" >&6; }
 		PJPROJECT_CONFIGURE_OPTS+=" --host=$host"
 	fi
 
-	export TAR PATCH SED NM EXTERNALS_CACHE_DIR DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT
+	export TAR PATCH SED NM EXTERNALS_CACHE_DIR AST_DOWNLOAD_CACHE DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT
 	export NOISY_BUILD
 	${GNU_MAKE} --quiet --no-print-directory -C ${PJPROJECT_DIR} \
 		PJPROJECT_CONFIGURE_OPTS="$PJPROJECT_CONFIGURE_OPTS" \
-		EXTERNALS_CACHE_DIR="${EXTERNALS_CACHE_DIR}" \
+		EXTERNALS_CACHE_DIR="${EXTERNALS_CACHE_DIR:-${AST_DOWNLOAD_CACHE}}" \
 		configure
 	if test $? -ne 0 ; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
@@ -9334,7 +9363,7 @@ $as_echo "$as_me: Unable to configure ${PJPROJECT_DIR}" >&6;}
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for bundled pjproject" >&5
 $as_echo_n "checking for bundled pjproject... " >&6; }
 
-	PJPROJECT_INCLUDE=$(${GNU_MAKE} --quiet --no-print-directory -C ${PJPROJECT_DIR} PJPROJECT_CONFIGURE_OPTS="$PJPROJECT_CONFIGURE_OPTS" EXTERNALS_CACHE_DIR="${EXTERNALS_CACHE_DIR}" echo_cflags)
+	PJPROJECT_INCLUDE=$(${GNU_MAKE} --quiet --no-print-directory -C ${PJPROJECT_DIR} PJPROJECT_CONFIGURE_OPTS="$PJPROJECT_CONFIGURE_OPTS" EXTERNALS_CACHE_DIR="${EXTERNALS_CACHE_DIR:-${AST_DOWNLOAD_CACHE}}" echo_cflags)
 	PJPROJECT_CFLAGS="$PJPROJECT_INCLUDE"
 	PBX_PJPROJECT=1