Change 2491

Request Review
Some consting in jam to make it more compilable by C++ compilers.

No functional change.

=== computer:1666: Change 37433 by perforce@perforce on 2002/10/30 16:08:51

Recreational const-ing of jam, for compilers that don't allow
"string" to be passed as a non-const char *.

This included a few places where we were modifying what could
possibly have been read-only storage, oddly enough.

No functional change.

=== computer:1666: Change 37602 by seiwald@play-seiwald on 2002/11/04 17:25:40
45 edited 0 added 0 deleted
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