Clone log4cplus from GitHub instead of the gitee mirror

Its ThreadPool submodule already comes from
github.com/log4cplus/ThreadPool, so pull the main repo from the
canonical github.com/log4cplus/log4cplus too, keeping both fetches
consistently routed through the wangguofang.net/github.com proxy
instead of mixing sources. Verified with a full build.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WGpSs9pKTbvPkmFvBaWhBp

alpine3.24/Dockerfile

@@ -120,7 +120,7 @@ RUN curl --fail --location --output protobuf.tar.gz \
     && cmake --build build --parallel "$(nproc)" --target install \
     && rm -rf build src
 
-RUN git clone --branch=REL_2_0_5 --depth=1 https://gitee.com/mirrors/log4cplus.git src \
+RUN git clone --branch=REL_2_0_5 --depth=1 https://github.com/log4cplus/log4cplus.git src \
     && git -C src submodule update --init --depth=1 threadpool \
     && cmake -G Ninja -S src -B build -DCMAKE_BUILD_TYPE=Release \
         -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \