Regex: Use REG_NOSUB
Regex: Use REG_NOSUB

This speeds up Russian processing (but not English, which has much
fewer patters in its 4.o.regex).
This is possible since we don't use \1 etc. escapes in any of the regexes.
If this will ever be needed a //s flag support that removes REG_NOSUB
can be easily added.

ampli/link-grammar,ampli/link-grammar,opencog/link-grammar,linas/link-grammar,opencog/link-grammar,opencog/link-grammar,ampli/link-grammar,ampli/link-grammar,linas/link-grammar,linas/link-grammar,ampli/link-grammar,linas/link-grammar,linas/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,linas/link-grammar,ampli/link-grammar,opencog/link-grammar,linas/link-grammar,linas/link-grammar,linas/link-grammar,ampli/link-grammar,opencog/link-grammar,opencog/link-grammar,opencog/link-grammar,ampli/link-grammar