Re #1751: fixed miscellaneous gcc warnings


git-svn-id: http://svn.pjsip.org/repos/pjproject@4890 74dad513-b988-da41-8d7b-12977e46ad98
Re #1762: Related to r4838, check whether the device supports the capture size before deciding to use it



git-svn-id: http://svn.pjsip.org/repos/pjproject@4891 74dad513-b988-da41-8d7b-12977e46ad98
Re #1751 (misc): Fixed compilation error due to the lack of the SSLv2 methods.
The fix will autodetect this and define OPENSSL_NO_SSL2 if necessary. Related to #1321.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4892 74dad513-b988-da41-8d7b-12977e46ad98