Log Message:
- use getcwd() instead of getwd().

- remove all compiler warnings on alpha

- add ${PKG_SYSCONFDIR}/pcb/local.inc where admins can list site specific
  libraries to be included instead of modifying one of the regularly
  installed/deinstalled files.  This way a local config is preserved when
  the pkg is upgraded.  Also a local config can be applied without modifying
  one of the files which is checksummed during the install.