shellcheck: test-network.sh issues

In test-network.sh line 8:
if [ -d "$CHUTNEY_PATH" -a -x "$TEST_NETWORK" ]; then
                        ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.


In test-network.sh line 19:
myname=$(basename $0)
                  ^-- SC2086: Double quote to prevent globbing and word splitting.


In test-network.sh line 23:
ORIGINAL_ARGS="$@"
              ^-- SC2124: Assigning an array to a string! Assign as array, or use * instead of @ to concatenate.


In test-network.sh line 55:
    if [ -d "$BUILDDIR/src/core/or" -a -d "$BUILDDIR/src/tools" ]; then
                                    ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.


In test-network.sh line 60:
    elif [ -d "$PWD/src/core/or" -a -d "$PWD/src/tools" ]; then
                                 ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.


In test-network.sh line 76:
if [ ! -d "$CHUTNEY_PATH" -o ! -x "$CHUTNEY_PATH/chutney" ]; then
                          ^-- SC2166: Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.


In test-network.sh line 80:
    elif [ -d "$TOR_DIR" -a -d "$TOR_DIR/../chutney" -a \
                         ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
                                                     ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.


In test-network.sh line 97:
if [ -d "$CHUTNEY_PATH" -a -x "$TEST_NETWORK" ]; then
                        ^-- SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.


In test-network.sh line 102:
    exec "$TEST_NETWORK" $ORIGINAL_ARGS
                         ^-- SC2086: Double quote to prevent globbing and word splitting.