bug#18454: Improve performance when -P (PCRE) is used in UTF-8 locales

[Paul Eggert]

On 12/19/2014 06:13 PM, Vincent Lefevre wrote:
both grep and sed should be fixed to obey RFC 3629

Shouldn't this be done in the C library code?  If mbrlen does the right 
thing, grep and sed should do the right thing.