Log Message:
In packages with djb-style compile scripts, properly enquote ${CC}
and ${CFLAGS}. This fixes the build of net/djbdns, as well as any
other of these packages passing down PKG_SYSCONFDIR via CFLAGS, as
well as being more generally correct for arbitrary user-defined
CFLAGS. Suggested by jlam.

For consistency across djbware in pkgsrc:

* In math/djbfft's and sysutils/daemontools's do-configure targets,
  remove leading @ from ${ECHO} lines; from the former, also remove
  unneeded single quotes from one such line.

* Rename net/publicfile's pre-build and sysutils/service-config's
  post-patch targets to do-configure.

* In sysutils/checkpassword's do-configure target, reorder creation
  of conf-cc, conf-ld, and conf-home.

All of the affected packages have been verified to compile.

XXX These packages probably have enough build goo in common to
XXX warrant an mk/djbware.mk. I'll investigate this post-freeze.