Log Message:
Update devel/rudiments to 0.54.

- tweaked code in configure script to remove -Werror* to be
  non-greedy
- updated semaphoreset/sharedmemory destructors to remove
  the semaphoreset/sharedmemory segment last
- added url class that uses libcurl (read-only for now)
- added support for urls to xmlsax (and thus xmldom and
  codetree)
- added http support to the url class for platforms that
  lack an appropriate libcurl
- charstring 1-argument trim methods trim all whitespace
  now, not just spaces
- added charstring::isNullOrEmpty()
- added read-until-terminator methods with maxbytes option
- applied George Carrette's listener class patch to not close
  invalid-epoll filedescriptors