configure.ac: Use 'email' instead of 'mail' on Cygwin.
Remove outdated '-mno-cygwin' error check.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools@3956 4ea69e1a-61f1-4043-bf83-b5c94c648137
Makefile.am, smartd.conf.5.in: Replace 'mail' by actual platform specific mailer.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools@3957 4ea69e1a-61f1-4043-bf83-b5c94c648137
examplescripts/README, examplescripts/Example[123]: Remove bashisms.
Use '/usr/bin/mail' instead of '/bin/mail'.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools@3958 4ea69e1a-61f1-4043-bf83-b5c94c648137
os_win32/daemon_win32.cpp: Support older MinGW headers with missing
struct SERVICE_DELAYED_AUTO_START_INFO.

git-svn-id: https://svn.code.sf.net/p/smartmontools/code/trunk/smartmontools@3959 4ea69e1a-61f1-4043-bf83-b5c94c648137