Only in imap-2007f: .patched-z_50ec_missing_headers.patch
diff -ur imap-2007f-orig/src/dmail/dmail.c imap-2007f/src/dmail/dmail.c
--- imap-2007f-orig/src/dmail/dmail.c	2017-11-04 06:31:25.313126397 +0000
+++ imap-2007f/src/dmail/dmail.c	2017-11-04 06:42:36.805654585 +0000
@@ -30,6 +30,7 @@
 #include <pwd.h>
 #include <errno.h>
 extern int errno;		/* just in case */
+#include <ctype.h>
 #include <sysexits.h>
 #include <sys/file.h>
 #include <sys/stat.h>
diff -ur imap-2007f-orig/src/mlock/mlock.c imap-2007f/src/mlock/mlock.c
--- imap-2007f-orig/src/mlock/mlock.c	2017-11-04 06:31:25.312386602 +0000
+++ imap-2007f/src/mlock/mlock.c	2017-11-04 06:39:45.466202025 +0000
@@ -40,6 +40,7 @@
 #include <netdb.h>
 #include <ctype.h>
 #include <string.h>
+#include <unistd.h>
 
 #define LOCKTIMEOUT 5		/* lock timeout in minutes */
 #define LOCKPROTECTION 0664
Only in imap-2007f/src/mlock: mlock.c.~1~
diff -ur imap-2007f-orig/src/tmail/tmail.c imap-2007f/src/tmail/tmail.c
--- imap-2007f-orig/src/tmail/tmail.c	2017-11-04 06:31:25.313698634 +0000
+++ imap-2007f/src/tmail/tmail.c	2017-11-04 06:42:23.350153840 +0000
@@ -30,6 +30,7 @@
 #include <pwd.h>
 #include <errno.h>
 extern int errno;		/* just in case */
+#include <ctype.h>
 #include <sysexits.h>
 #include <sys/file.h>
 #include <sys/stat.h>