slosh: rename the project from sl0ppty

sl0p + pty was error-prone to type and the zero made it worse; slosh
(slop + sh) is one syllable, impossible to typo, and slosh.foo is ours.

Mechanical rename everywhere it appears: binary, env vars (SLOSH,
SLOSH_SESSION, SLOSH_BIN, SLOSH_CONFIG), socket dir (/tmp/slosh-<uid>,
$XDG_RUNTIME_DIR/slosh), config path (~/.config/slosh), header guards,
src/sl0ppty.h -> src/slosh.h, contrib/sl0ppty-dev -> contrib/slosh-dev,
the driving-slosh skill, docs and tests. The sl0ppi fork references and
the sl0p theme stay: one is history, the other is the brand.

The rename surfaced a latent bug in test_osc5577: the hello-reply
answer always appeared on screen twice (ECHOCTL echo plus cat -v), but
a seven-character implementation name happened to wrap the second copy
across the 60-column boundary, so counting substrings in wrapped text
found one and passed for the wrong reason. A five-character name moved
the wrap and exposed it. The loop guard itself is correct -- with echo
off before the request there is exactly one reply -- so the test now
counts on de-wrapped text and tolerates the pane's own echo.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/pane.c b/src/pane.c
index 16734c7..00b1e59 100644
--- a/src/pane.c
+++ b/src/pane.c
@@ -1,7 +1,7 @@
 /* A pane: one pty, one libghostty-vt terminal, and the code that composites
  * its viewport into the screen. */
 #define _GNU_SOURCE
-#include "sl0ppty.h"
+#include "slosh.h"
 
 #include <errno.h>
 #include <stdio.h>
@@ -155,7 +155,7 @@ static void on_osc5577(const char *verb, const char *payload, void *ud) {
   } else if (strcmp(verb, "hello") == 0) {
     /* Our addition to the fork's protocol, which is unversioned in practice:
      * a program can ask what it is talking to before using anything new. */
-    const char *reply = "\033]5577;1;hello-reply;sl0ppty;1\033\\";
+    const char *reply = "\033]5577;1;hello-reply;slosh;1\033\\";
     pane_write(p, reply, strlen(reply));
   } else if (p->osc_cb) {
     p->osc_cb(p, verb, payload, p->osc_ud); /* purpose, and anything later */