Removed debugging statements.

src/debug_helpers.c

@@ -0,0 +1,26 @@
+/*
+ * Convert a string to its hexadecimal representation.
+ *
+ * Use like this:
+ * log_write(0, LOG_MAIN, "DEBUG: %s", string2hex(var, var_len));
+*/
+char * string2hex(unsigned char * input, size_t length) {
+    const int growth = 3;
+    char * outstring = store_get(growth*length+1);
+    memset(outstring, 0, 3*length+1);
+    for (int i =0; i<length; i++) {
+        sprintf(outstring+i*growth, "%02x ", input[i]);
+    }
+    return outstring;
+}
+
+/*
+ * How to debug this library:
+ *
+ * 1. Add this code to the first “breakpoint”:
+ *    log_write(0, LOG_MAIN, "pid: %d", getpid()); int busywait = 0; while (busywait == 0) {}
+ * 2. Compile.
+ * 3. Run “exim -be […]” to call the lib; see simple_exim_test.sh for details.
+ * 4. Read exim pid from log output. Attach to the looping exim process with “gdb -p PID”
+ * 5. Prepare breakpoints, watches, etc. Set busywait to 1 and continue.
+ */