build with options disabling root file access and environment

This should avoid or limit the security impact of issues in parsing of
terminfo files or the TERMINFO environment variable for setuid/gid
binaries.

ncurses.spec

@@ -127,6 +127,8 @@ common_options="\
     --enable-overwrite \
     --enable-pc-files \
     --enable-xmc-glitch \
+    --disable-root-access \
+    --disable-root-environ \
     --disable-stripping \
     --disable-wattr-macros \
     --with-cxx-shared \