Update Tramp manual

* doc/misc/tramp.texi (Remote processes): Add another reason why a
direct asynchronous process could fail.

(cherry picked from commit 85d2d7982d41d7c8ea31dd7150c78428a968944a)

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index d7b9e7b17588895e4d2131ddb8b7c2fd9e5f3260..11beed77a798b34ae4a9ec7fb2fa85c1bebffccf 100644 (file)
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -4580,6 +4580,11 @@ It does not report the remote terminal name via @code{process-tty-name}.
 
 @item
 It does not set process property @code{remote-pid}.
+
+@item
+It fails, when the command is too long.  This can happen on
+directories with a long directory name, or when the remote @env{PATH}
+and/or other environment variables, which must be set, are too long.
 @end itemize
 
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