- remove rename php.ini-development from user space build

- temporary disable igbinary, because install not successfully completed with segmentation fault
* partition of tune opts semantically divided
- remove unused env-vars from docker compose base in src and user space builds

dockerfiles/php-fpm/php74.Dockerfile

@@ -26,12 +26,9 @@ RUN if [ ${INSTALL_PEAR_MAIL} = true ]; then \
 ;fi
 
 ###########################################################################
-# php.ini opts:
+# Tune opts:
 ###########################################################################
 
-# https://github.com/php/php-src/blob/master/php.ini-development
-RUN mv "$PHP_INI_DIR/php.ini-development" "$PHP_INI_DIR/php.ini"
-
 ARG PHP_OPT_SHORT_OPEN_TAG=Off
 RUN sed -i "s/^short_open_tag = .*/short_open_tag = $PHP_OPT_SHORT_OPEN_TAG/g" "$PHP_INI_DIR/php.ini"