bsd-user: spelling fixes: necesary, agrument, undocummented

Fixes: a99d740347 "bsd-user: Implement do_obreak function"
Fixes: 8632729060 "bsd-user: Implement freebsd_exec_common, used in implementing execve/fexecve."
Fixes: bf14f13d8b "bsd-user: Implement stat related syscalls"
Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

bsd-user/bsd-mem.h

@@ -235,7 +235,7 @@ static inline abi_long do_obreak(abi_ulong brk_val)
         return target_brk;
     }
 
-    /* Release heap if necesary */
+    /* Release heap if necessary */
     if (new_brk < old_brk) {
         target_munmap(new_brk, old_brk - new_brk);
 

bsd-user/freebsd/os-proc.c

@@ -115,7 +115,7 @@ abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
     }
 
     qarg0 = argp = g_new0(char *, argc + 9);
-    /* save the first agrument for the emulator */
+    /* save the first argument for the emulator */
     *argp++ = (char *)getprogname();
     qargp = argp;
     *argp++ = (char *)getprogname();

bsd-user/freebsd/os-stat.h

@@ -146,7 +146,7 @@ static inline abi_long do_freebsd_fstatat(abi_long arg1, abi_long arg2,
     return ret;
 }
 
-/* undocummented nstat(char *path, struct nstat *ub) syscall */
+/* undocumented nstat(char *path, struct nstat *ub) syscall */
 static abi_long do_freebsd11_nstat(abi_long arg1, abi_long arg2)
 {
     abi_long ret;
@@ -162,7 +162,7 @@ static abi_long do_freebsd11_nstat(abi_long arg1, abi_long arg2)
     return ret;
 }
 
-/* undocummented nfstat(int fd, struct nstat *sb) syscall */
+/* undocumented nfstat(int fd, struct nstat *sb) syscall */
 static abi_long do_freebsd11_nfstat(abi_long arg1, abi_long arg2)
 {
     abi_long ret;
@@ -175,7 +175,7 @@ static abi_long do_freebsd11_nfstat(abi_long arg1, abi_long arg2)
     return ret;
 }
 
-/* undocummented nlstat(char *path, struct nstat *ub) syscall */
+/* undocumented nlstat(char *path, struct nstat *ub) syscall */
 static abi_long do_freebsd11_nlstat(abi_long arg1, abi_long arg2)
 {
     abi_long ret;