patch 8.0.0744: terminal window does not use a pty

Problem:    A terminal window uses pipes instead of a pty.
Solution:   Add pty support.
diff --git a/src/proto/os_unix.pro b/src/proto/os_unix.pro
index 700b69e..11191c9 100644
--- a/src/proto/os_unix.pro
+++ b/src/proto/os_unix.pro
@@ -57,7 +57,7 @@
 void mch_new_shellsize(void);
 int mch_parse_cmd(char_u *cmd, int use_shcf, char ***argv, int *argc);
 int mch_call_shell(char_u *cmd, int options);
-void mch_start_job(char **argv, job_T *job, jobopt_T *options);
+void mch_job_start(char **argv, job_T *job, jobopt_T *options);
 char *mch_job_status(job_T *job);
 job_T *mch_detect_ended_job(job_T *job_list);
 int mch_stop_job(job_T *job, char_u *how);