merging recent changes related to autoloading and tool plugins

more assorted script enhancements

merging latest improvements (CM, BTrace)

implicit anchors gone; update to previous HISTORY entry

merging back my devel changes (anchor environments)

merge-back from my devel branch; see HISTORY

bring revisions from the vendor branch to the trunk

merging changes from devel branch; see HISTORY

merged my path anchor changes into main trunk
more config/srcarchiveurl! YOU NEED NEW BINFILES more config/srcarchiveurl!
Read HISTORY and src/system/README!

merging back changes from blume_devel_v110_26_2

CM changes: standalone builds, better CMB.make/deliver, general improvements

two-stage fallback to accomodate config values in plugin modules

conserve_memory off by default; done anyway at bootstrap time; docu update

pickle dropper

memoize put into its own module

library dependenies reorganized (viscomp-core.cm etc.)

small change to SafeIO; cosmetic fix of master-slave interrupt handling; doc

servers: X-platform, rsh, stabilization now work

prepared for switching to rb-trees (once they work correctly)

symval added; getterSetter changed to { get, set }

old-style operators recognized (with warning message)

fixed AutoDir (handling of ..)

small change to AbsPath; NEW_CM dependence eliminated from .cm files

bfc_fetch_xxx bogosity eliminated; more fleshing out of CM

better pathconfig interface + some cosmetic improvements

more bugs/problems eliminated from the list...

parse caching limit; various control flags exported

bootstrapping works now (mainly); PathConfig code cleaned majorly

a host of changes related mostly to pathname handling

various changes in pathname handling etc.

error flag in source cancelled; IO vs. interrupts handled more robustly

stablefile format enhanced; bootstrap compiler shows signs of life

stabilization code mostly done

first steps towards stabilize (not finished yet)

dyn-tstamp eliminated; more fiddling with sharing (now checked statically)

bug in handling of private flag fixed

persistent state/error handling bogosity fixed

most of recompilation/execution machinery in place

skeleton type simplified; improved conversion, etc.

more towards dependency analysis

early beginning of dep. analysis

stdtool; yacc/lex/burg tools; some odd fixes here and there

stage0 -- links fine (for testing); parses correctly (apparently)

implementation of Tools mechanism added

started adding dependency graph stuff

more fleshing out semant

some small changes + re-commit after server crash(?)