Merge branch 'bw/maint-1.7.9-solaris-getpass'

The recent update to terminal I/O interface to get passwords &c
interactively didn't quite work on Solaris.

* bw/maint-1.7.9-solaris-getpass:
  Enable HAVE_DEV_TTY for Solaris
  terminal: seek when switching between reading and writing

Makefile

@@ -1014,6 +1014,7 @@ ifeq ($(uname_S),SunOS)
 	NO_REGEX = YesPlease
 	NO_FNMATCH_CASEFOLD = YesPlease
 	NO_MSGFMT_EXTENDED_OPTIONS = YesPlease
+	HAVE_DEV_TTY = YesPlease
 	ifeq ($(uname_R),5.6)
 		SOCKLEN_T = int
 		NO_HSTRERROR = YesPlease

compat/terminal.c

@@ -59,6 +59,7 @@ char *git_terminal_prompt(const char *prompt, int echo)
 
 	r = strbuf_getline(&buf, fh, '\n');
 	if (!echo) {
+		fseek(fh, SEEK_CUR, 0);
 		putc('\n', fh);
 		fflush(fh);
 	}