net-fs/autofs: add initial 5.0.7-r3, copy from r2

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
net-fs/autofs: remove epatch_user, since it already include by autotools-utils

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
net-fs/autofs: fix libtirpc link err, bug #464120

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
net-fs/autofs: dmalloc support require dev-libs/dmalloc[threads] enabled

problem here is that autofs linke to libdmallocth, (not libdmalloc.so)
---
x86_64-pc-linux-gnu-gcc -O2 -pipe -march=core2  -D_REENTRANT -D_FILE_OFFSET_BI  TS=64 -D_REENTRANT -D_FILE_OFFSET_BITS=64 -rdynamic -fPIE -D_GNU_SOURCE -I../i  nclude -DAUTOFS_LIB_DIR=\"/usr/lib64/autofs\"  -DAUTOFS_MAP_DIR=\"/etc/autofs\  " -DAUTOFS_CONF_DIR=\"/etc/conf.d\" -DAUTOFS_FIFO_DIR=\"/run\" -DAUTOFS_FLAG_D  IR=\"/run\" -DVERSION_STRING=\"5.0.7\" -I/usr/include/libxml2 -c flag.c
  x86_64-pc-linux-gnu-gcc -Wl,-O1 -Wl,--as-needed -rdynamic -pie -o automount au  tomount.o indirect.o direct.o spawn.o module.o mount.o lookup.o state.o flag.o   ../lib/autofs.a -lpthread -ldmallocth -lnsl -ldl -lxml2 -lz -lm -ldl
  /usr/lib/gcc/x86_64-pc-linux-gnu/4.8.0/../../../../x86_64-pc-linux-gnu/bin/ld:   cannot find -ldmallocth
  collect2: error: ld returned 1 exit status
  make[1]: *** [automount] Error 1

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>
net-fs/autofs: fix force-shutdown typo

Signed-off-by: Lan Yixun (dlan) <dennis.yxun@gmail.com>