- Remove unused sysvec variables from various syscalls.conf.

- Send the systrace_args files for all the compat ABIs to /dev/null for
  now.  Right now makesyscalls.sh generates a file with a hardcoded
  function name, so it wouldn't work for any of the ABIs anyway.  Probably
  the function name should be configurable via a 'systracename' variable
  and the functions should be stored in a function pointer in the sysvec
  structure.

sys/amd64/linux32/syscalls.conf

@@ -8,4 +8,4 @@ sysmk="/dev/null"
 syscallprefix="LINUX_SYS_"
 switchname="linux_sysent"
 namesname="linux_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/compat/freebsd32/syscalls.conf

@@ -8,4 +8,4 @@ sysmk="/dev/null"
 syscallprefix="FREEBSD32_SYS_"
 switchname="freebsd32_sysent"
 namesname="freebsd32_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/compat/svr4/syscalls.conf

@@ -8,4 +8,4 @@ sysmk="/dev/null"
 syscallprefix="SVR4_SYS_"
 switchname="svr4_sysent"
 namesname="svr4_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/i386/ibcs2/syscalls.conf

@@ -8,4 +8,4 @@ syssw="ibcs2_sysent.c"
 syscallprefix="IBCS2_SYS_"
 switchname="ibcs2_sysent"
 namesname="ibcs2_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/i386/ibcs2/syscalls.isc.conf

@@ -9,4 +9,4 @@ syssw="ibcs2_isc_sysent.c"
 syscallprefix="IBCS2_ISC_"
 switchname="isc_sysent"
 namesname="isc_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/i386/ibcs2/syscalls.xenix.conf

@@ -8,4 +8,4 @@ syssw="ibcs2_xenix_sysent.c"
 syscallprefix="IBCS2_XENIX_"
 switchname="xenix_sysent"
 namesname="xenix_syscallnames"
-sysvec="\n"
+systrace="/dev/null"

sys/i386/linux/syscalls.conf

@@ -8,4 +8,4 @@ sysmk="/dev/null"
 syscallprefix="LINUX_SYS_"
 switchname="linux_sysent"
 namesname="linux_syscallnames"
-sysvec="\n"
+systrace="/dev/null"