Only log warning if value was not defaulted. Allow immediate flush even on buffered streams

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/branches/BRANCH_2_0_EXPERIMENTAL/rgoers@1084050 13f79535-47bb-0310-9956-ffa450edef68
2 files changed
tree: ae05eb179081a0041e8da6861611e611e466f540
  1. log4j12-api/
  2. log4j2-api/
  3. log4j2-core/
  4. slf4j-impl/
  5. pom.xml