mount: dont include NFS headers if not needed; drop support for Linux <2.2.0

function                                             old     new   delta
nfs_err_stat                                           -      18     +18
nfs_err_errnum                                         -      18     +18
nfs_strerror                                          56      50      -6
nfsmount                                            3567    3541     -26
nfs_errtbl                                            80       -     -80
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/2 up/down: 36/-112)           Total: -76 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed