Use the correct flags field when checking for a read-only filesystem in ufs_dirbad(). The mnt_stat.f_flags field is only updated by the syscalls *statfs and getfsstat, so mnt_flag should be used instead.
Use the correct flags field when checking for a read-only filesystem
in ufs_dirbad(). The mnt_stat.f_flags field is only updated by the
syscalls *statfs and getfsstat, so mnt_flag should be used instead.

This only affects whether or not a panic is generated on detection of
certain types of directory corruption.

Reviewed by:	mckusick

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase