Tramp code cleanup

Tramp code cleanup

* lisp/net/tramp.el (tramp-shell-prompt-pattern)
(tramp-wrong-passwd-regexp, tramp-method-regexp-alist)
(tramp-domain-regexp, tramp-host-regexp, tramp-ipv6-regexp)
(tramp-port-regexp, tramp-debug-outline-regexp)
(tramp-drop-volume-letter, tramp-parse-shostkeys)
(tramp-handle-file-name-case-insensitive-p):
* lisp/net/tramp-adb.el (tramp-adb-send-command-and-check):
* lisp/net/tramp-ftp.el (tramp-ftp-enable-ange-ftp):
* lisp/net/tramp-gvfs.el (tramp-gvfs-monitor-process-filter):
* lisp/net/tramp-sh.el (tramp-display-escape-sequence-regexp)
(tramp-device-escape-sequence-regexp):
* lisp/net/tramp-smb.el (tramp-smb-do-file-attributes-with-stat)
(tramp-smb-handle-set-file-acl, tramp-smb-read-file-entry):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-handle-file-selinux-context):
Use character classes in regexp.

* lisp/net/tramp-adb.el (tramp-adb-ls-date-year-regexp)
(tramp-adb-ls-date-time-regexp): New defconst.
(tramp-adb-ls-date-regexp, tramp-adb-ls-toolbox-regexp)
(tramp-adb-sh-fix-ls-output): Use them.
(tramp-adb-handle-set-file-times, tramp-adb-maybe-open-connection):
Apply `eval-when-compile' on constant concat data.
(tramp-do-parse-file-attributes-with-ls):
Suppress `signal-hook-function'.
(tramp-adb--gnu-switches-to-ash): Remove unused function.
(tramp-adb-handle-set-file-modes): Qhote argument.
(tramp-adb-maybe-open-connection): Set file property rather than flush.

* lisp/net/tramp-cmds.el (tramp-rename-these-files):
Apply `eval-when-compile' on constant concat data.

* lisp/net/tramp-gvfs.el (tramp-gvfs-file-attributes)
(tramp-gvfs-file-attributes-with-gvfs-ls-regexp): Embed them in
`eval-and-compile'.
(tramp-gvfs-get-directory-attributes): Apply `eval-when-compile'
on constant concat data.