README: rename BUGS -> RESTRICTIONS

These are intentional restrictions not likely to change any time in the
near future.

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
replace fgets with EINTR-safe version

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pass string length to _mini_strtrim

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
check for buffer overflow

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
t/Makefile run check by default

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>
pull updated tap.c

Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com>