Tools: Make the Debian and RPM setup scripts more strict.

We use debian-setup.sh and rpm-setup.sh to build the containers in
https://gitlab.com/wireshark/wireshark-containers/. Make sure they fail
with a nonzero exit status, otherwise we might end up with an invalid
container image.

Make sure OPTIONS is defined in all of the setup scripts that use it.

tools/alpine-setup.sh

@@ -29,6 +29,7 @@ then
 fi
 
 ADDITIONAL=0
+OPTIONS=
 for arg; do
 	case $arg in
 		--install-optional)

tools/arch-setup.sh

@@ -34,6 +34,7 @@ fi
 ADDITIONAL=0
 TESTDEPS=0
 AUR=0
+OPTIONS=
 for arg; do
 	case $arg in
 		--install-optional)

tools/bsd-setup.sh

@@ -30,6 +30,7 @@ then
 	exit 1
 fi
 
+OPTIONS=
 for op
 do
 	if [ "$op" = "--install-optional" ]

tools/debian-setup.sh

@@ -11,6 +11,8 @@
 # that way.
 #
 
+set -e -u -o pipefail
+
 if [ "$1" = "--help" ]
 then
 	printf "\\nUtility to setup a debian-based system for Wireshark Development.\\n"
@@ -33,6 +35,7 @@ fi
 ADDITIONAL=0
 DEBDEPS=0
 TESTDEPS=0
+OPTIONS=
 for arg; do
 	case $arg in
 		--install-optional)
@@ -113,7 +116,7 @@ TESTDEPS_LIST=
 # Adds package $2 to list variable $1 if the package is found.
 # If $3 is given, then this version requirement must be satisfied.
 add_package() {
-	local list="$1" pkgname="$2" versionreq="$3" version
+	local list="$1" pkgname="$2" versionreq="${3:-}" version
 
 	version=$(apt-cache show "$pkgname" 2>/dev/null |
 		awk '/^Version:/{ print $2; exit}')

tools/msys2-setup.sh

@@ -27,6 +27,7 @@ fi
 ADDITIONAL=0
 TESTDEPS=0
 LUA=0
+OPTIONS=
 for arg; do
 	case $arg in
 		--install-optional)

tools/rpm-setup.sh

@@ -11,6 +11,8 @@
 # that way.
 #
 
+set -e -u -o pipefail
+
 if [ "$1" = "--help" ]
 then
 	echo "\nUtility to setup a rpm-based system for Wireshark Development.\n"
@@ -31,6 +33,7 @@ fi
 
 ADDITIONAL=0
 RPMDEPS=0
+OPTIONS=
 for arg; do
 	case $arg in
 		--install-optional)