pgsql: Suppress errors if the server gets lost.

lib/modules/Sql.pmod/pgsql.pike

@@ -5,8 +5,8 @@
 //! This is an interface to the PostgreSQL database
 //! server. This module is independent of any external libraries.
 //! Note that you @b{do not@} need to have a
-//! PostgreSQL server running on your host to use this module: you can
-//! connect to the database over a TCP/IP socket.
+//! PostgreSQL server running on @b{your@} host to use this module: you can
+//! connect to the database over a TCP/IP socket on a different host.
 //!
 //! This module replaces the functionality of the older @[Sql.postgres]
 //! and @[Postgres.postgres] modules.
@@ -1193,9 +1193,11 @@ private void procmessage() {
       }
     };				// We only get here if there is an error
     if(err==MAGICTERMINATE) {	// Announce connection termination to server
+      catch {
         object cs = ci->start();
         CHAIN(cs)->add("X\0\0\0\4");
         cs->sendcmd(SENDOUT);
+      };
       terminating=1;
       err=0;
     } else if(stringp(err)) {

lib/modules/Sql.pmod/pgsql_util.pmod

@@ -200,7 +200,7 @@ class bufcon {
       if (mode == SYNCSEND) {
         add(PGSYNC);
         realbuffer->stashqueue->write(1);
-        mode = SENDOUT;
+        mode = SENDOUT;	    // Demote it to prevent an extra SYNC upon stashflush
       }
     }
     realbuffer->stash->add(this);