Stop using .com extension in monorepo

The WIN32 CreateProcess() function does not require an .exe or .com
suffix in order to spawn an executable. Now that we have Cosmo bash
we're no longer so dependent on the cmd.exe prompt.

libc/calls/chmod.c

@@ -23,7 +23,7 @@
  * Changes permissions on file, e.g.:
  *
  *     CHECK_NE(-1, chmod("foo/bar.txt", 0644));
- *     CHECK_NE(-1, chmod("o/default/program.com", 0755));
+ *     CHECK_NE(-1, chmod("o/default/program", 0755));
  *     CHECK_NE(-1, chmod("privatefolder/", 0700));
  *
  * The esoteric bits generally available on System Five are:

libc/calls/fchmodat.c

@@ -36,7 +36,7 @@ int sys_fchmodat2(int, const char *, unsigned, int);
  * Changes permissions on file, e.g.:
  *
  *     CHECK_NE(-1, fchmodat(AT_FDCWD, "foo/bar.txt", 0644));
- *     CHECK_NE(-1, fchmodat(AT_FDCWD, "o/default/program.com", 0755));
+ *     CHECK_NE(-1, fchmodat(AT_FDCWD, "o/default/program", 0755));
  *     CHECK_NE(-1, fchmodat(AT_FDCWD, "privatefolder/", 0700));
  *
  * @param path must exist

libc/calls/getprogramexecutablename.greg.c

@@ -118,6 +118,8 @@ static char *CopyWithCwd(const char *q, char *p, char *e) {
 
 // if q exists then turn it into an absolute path. we also try adding
 // a .com suffix since the ape auto-appends it when resolving
+//
+// TODO(jart): is this still relevant?
 static int TryPath(const char *q, int com) {
   char *p;
   if (!(p = CopyWithCwd(q, g_prog.u.buf,

libc/calls/pledge-linux.c

@@ -950,14 +950,14 @@ static const uint16_t kPledgeUnveil[] = {
 
 // placeholder group
 //
-// pledge.com checks this to do auto-unveiling
+// pledge checks this to do auto-unveiling
 static const uint16_t kPledgeVminfo[] = {
     __NR_linux_sched_yield,  //
 };
 
 // placeholder group
 //
-// pledge.com uses this to auto-unveil /tmp and $TMPPATH with rwc
+// pledge uses this to auto-unveil /tmp and $TMPPATH with rwc
 // permissions. pledge() alone (without unveil() too) offers very
 // little security here. consider using them together.
 static const uint16_t kPledgeTmppath[] = {

libc/calls/pledge.c

@@ -163,7 +163,7 @@
  *   interpreted, and ape binaries, you'll usually want `rpath` and
  *   `prot_exec` too. With APE it's possible to work around this
  *   requirement, by "assimilating" your binaries beforehand. See the
- *   assimilate.com program and `--assimilate` flag which can be used to
+ *   assimilate program and `--assimilate` flag which can be used to
  *   turn APE binaries into static native binaries.
  *
  * - "prot_exec" allows mmap(PROT_EXEC) and mprotect(PROT_EXEC). This is
@@ -176,13 +176,13 @@
  *   calls on Linux.
  *
  * - "vminfo" OpenBSD defines this for programs like `top`. On Linux,
- *   this is a placeholder group that lets tools like pledge.com check
+ *   this is a placeholder group that lets tools like pledge check
  *   `__promises` and automatically unveil() a subset of files top would
  *   need, e.g. /proc/stat, /proc/meminfo.
  *
  * - "tmppath" allows unlink, unlinkat, and lstat. This is mostly a
- *   placeholder group for pledge.com, which reads the `__promises`
- *   global to determine if /tmp and $TMPPATH should be unveiled.
+ *   placeholder group for pledge, which reads the `__promises` global
+ *   to determine if /tmp and $TMPPATH should be unveiled.
  *
  * `execpromises` only matters if "exec" is specified in `promises`. In
  * that case, this specifies the promises that'll apply once execve()

libc/calls/read-nt.c

@@ -368,7 +368,7 @@ static textwindows int ProcessKeyEvent(const struct NtInputRecord *r, char *p) {
 // To use the tty mouse events feature:
 //   - write(1, "\e[?1000;1002;1015;1006h") to enable
 //   - write(1, "\e[?1000;1002;1015;1006l") to disable
-// See o//examples/ttyinfo.com and o//tool/viz/life.com
+// See o//examples/ttyinfo and o//tool/viz/life
 static textwindows int ProcessMouseEvent(const struct NtInputRecord *r,
                                          char *b) {
   char *p = b;