Some enhancements to the comments:

- give hint where compiler and optimization flags have to
  specified (under CC and OPTIM)

- give hint that using -O3 (or -O6 which is used often for pgcc) is risky

- remove example from out-commented entry because this is
  inconsistent with the other entries and only leads to less
  thinking by the user

Feel free to fix me here.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81111 13f79535-47bb-0310-9956-ffa450edef68