[inseparable changes from patch from perl5.003_21 to perl5.003_22]

[inseparable changes from patch from perl5.003_21 to perl5.003_22]

 CORE LANGUAGE CHANGES

Subject: Fix parsing of C< ${ xyz } >
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c

Subject: Don't parse method calls in strings
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c

 OTHER CORE CHANGES

Subject: Fix memory corruption from formats
From: Chip Salzenberg <chip@atlantic.net>
Files: op.c perl.c perly.c perly.c.diff perly.y proto.h sv.c toke.c