Log Message:
ugrep: updated to 7.1.1

ugrep v7.1.1

fix negative character classes when option -i or --ignore-case is used and make \ 
ugrep closely emulate GNU grep's character class behavior when options -i and -P \ 
are used
appease -Woverload-virtual and -Wshadow warnings when building the RE/flex \ 
library, the TUI, and indexer (some warnings remain in ugrep.cpp)