build(docker): enable stabber for functional tests

- Enable stabber build from fork git.jabber.space/jabber.developer2/stabber
- Use fix/xmpp-parsing branch with XMPP stream parsing fixes
- Add tcl-expect-dev package for Debian/Ubuntu (required by libexpect)
- Add expect package for Arch Linux

Dockerfile.debian

@@ -30,19 +30,20 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   valgrind \
   libsqlite3-dev \
   libgdk-pixbuf-2.0-dev \
-  libqrencode-dev
+  libqrencode-dev \
+  tcl-expect-dev
 
 RUN mkdir -p /usr/src/{stabber,libstrophe,profanity}
 WORKDIR /usr/src
 
-#RUN git clone https://github.com/boothj5/stabber
+RUN git clone -c http.sslverify=false -b fix/xmpp-parsing https://git.jabber.space/jabber.developer2/stabber
 RUN git clone -c http.sslverify=false https://github.com/strophe/libstrophe
 
-#WORKDIR /usr/src/stabber
-#RUN ./bootstrap.sh
-#RUN ./configure --prefix=/usr --disable-dependency-tracking
-#RUN make
-#RUN make install
+WORKDIR /usr/src/stabber
+RUN ./bootstrap.sh
+RUN ./configure --prefix=/usr --disable-dependency-tracking
+RUN make
+RUN make install
 
 WORKDIR /usr/src/libstrophe
 RUN ./bootstrap.sh