Testsuite: Allow input lines starting with ":<cmd>:", like ":sleep:".

This somehow mimics the behaviour of the client tool, but works for
*any* input line that is sent to the application. This reverts the
unfortunate take abusing the client's special notation '>>> '.

Currently implemented:

        - :eval:
        - :neol:
        - :sleep:

1 files changed, 15 insertions, 12 deletions

diff --git a/test/README b/test/README
index a399765e2..c0f548292 100644
--- a/test/README
+++ b/test/README
@@ -862,15 +862,21 @@ The remaining commands are followed by data lines for their standard input,
 terminated by four asterisks ("****"). Even if no data is required for the particular
 usage, the asterisks must be given.
 
-If the input line starts with '>>> ', this prefix and any trailing spaces
-(including line feed) are removed. The reminder is processed with Perl's
-string eval() function, effectivly evaluatiing escape sequences like
-'\x41', or '\r'.  If you need a line feed there, you need to encode it
-according to your needs.
+If the input line starts with ':<cmd>:', this prefix is removed and the
+line is processed by the runtest script before sending. The following
+commands are recognised:
 
-If the input line starts with '\>>> ', the backslash is removed and the
-rest of the line is passed as input. This is used by the client tool,
-which understands the '>>> ' prefix for similar processing.
+- "eval": process the reset of the line with Perl's string eval()
+  function. This can be used to send arbitrary data by encoding it as
+  escape sequences (e.g. "\x41\101"). If you need a line ending, you have
+  to append it accordingly (e.g. "\r\n").
+
+- "noeol": do not terminate the data sent to the application with an end
+  of line character.
+
+- "sleep": interpret the rest of the line as an integer and sleep for
+  that number of seconds before proceeding. No data will be output to
+  the application.
 
 
   background
@@ -1056,10 +1062,7 @@ Lines in client scripts are of several kinds:
 
 (5) ">>> ": If a line begins with three '>' characters and a space, the rest of the
     line is input to be sent to the server.  Backslash escaping is done as
-    described below, but no trailing "\r\n" is sent. As the runtest's 
-    input processing catches the '>>> ' for its string eval, you may
-    want to escape from this first stage processing by prefixing your
-    line with '\'.
+    described below, but no trailing "\r\n" is sent.
 
 (6) "<<< ": If a line begin with three '<' characters and a space, the rest of the
     line is a filename; the content of the file is inserted into the script