boost fixes

docker/x86_64/mingw64

@@ -495,7 +495,7 @@ RUN if [ -f "/3rd_party/boost_${MY_BOOST2_MAJOR_VERSION}_${MY_BOOST2_MINOR_VERSI
       && ./bootstrap.sh \
         --with-libraries=atomic,chrono,date_time,filesystem,iostreams,locale,log,program_options,random,regex,serialization,system,test,thread \
         address-model=64 \
-        cxxstd=${MY_CXX_STANDARD} \
+        cxxstd=20 \
         cxxstd-dialect=gnu \
         architecture=x86 \
         link=static,shared \
@@ -509,7 +509,7 @@ RUN if [ -f "/3rd_party/boost_${MY_BOOST2_MAJOR_VERSION}_${MY_BOOST2_MINOR_VERSI
         --prefix=${MY_MINGW_DIR} \
         -j${MY_NUM_JOBS} \
         address-model=64 \
-        cxxstd=${MY_CXX_STANDARD} \
+        cxxstd=20 \
         cxxstd-dialect=gnu \
         architecture=x86 \
         link=static,shared \
@@ -552,8 +552,8 @@ RUN if [ -f "/3rd_party/boost_${MY_BOOST_MAJOR_VERSION}_${MY_BOOST_MINOR_VERSION
         -j${MY_NUM_JOBS} \
         address-model=64 \
         architecture=x86 \
-	cxxstd=${MY_CXX_STANDARD} \
-	cxxstd-dialect=gnu \
+        cxxstd=${MY_CXX_STANDARD} \
+        cxxstd-dialect=gnu \
         link=static,shared \
         target-os=windows \
         threading=multi \