FIX Issue#548 Update Loader: INCLUDED? doesn't work properly with encapped Re

Removing `join encap-fs/base file` seems to attach 'none value to the beginning of the file name, so the file does not match properly with previously included files.

I tested this by encapping red and testing with Kaj's SDL examples that were double including common.reds and failing to compile.  With this change, those files compiled without trouble.
Revert "FIX Issue#548 Update Loader: INCLUDED? doesn't work properly with encapped Re"

This reverts commit 3187001b90904a72a332464a72185f504e8e3853.
FEAT: ELF: added on-load/on-unload support for DLL
Update Red/System loader.r to exclude encap-fs/base if 'none
FEAT: preliminary PARSE implementation
FEAT: added `rs-next` internal function support for series.
FEAT: PARSE now wired into the runtime and operational.

Only block! parsing works atm.
FIX: wrong native ID for PARSE.
TESTS: added block-end tests to parse tests
FEAT: PARSE now supports any-string parsing.
FIX: corrupted `type` variable in many places.
FIX: input advancing is now mainly done when matching occurs, ST_NEXT_INPUT have been repurposed to do one step forward only.
FEAT: replaced /ALL by /OVER. /ALL is now the default mode. /OVER skips spaces.
FIX: minor code cleanups.
FIX: fixed rules overflow bugs, factorized exit code in new ST_END state. All tests passing now.
FIX: improved handling of words evaluation in PARSE. Fixes some use cases.
TESTS: reformatted some tests, plus additional string tests.
TESTS: updated byte-test.r
TESTS: comment out test in byte-test.r until version 2
FIX: symbol base index off by one in dump-symbols debugging function.
FIX: COPY/PART wrongly process part argument if series.
FEAT: added internal `rs-abs-at` function for returning the element at and absolute index.
FIX: minor code factorization in string.reds.
FIX: missing fix for COPY/PART on string! series.
FEAT: added internal `none/rs-push` function.