Set RSA_MIN_SIZE default to 2048 bits

[embhorn]

Description

Increase the minimum RSA size for generating keys to 2048 bits.

Testing

Updated tests for new minimum. Will add config tests for RSA 1024 bit keys.

Checklist

• added tests
• updated/added doxygen
• updated appropriate READMEs
• Updated manual and documentation

[embhorn]

Retest this please

�[1;38;5;243mTesting configuration:�[0m
�[1;38;5;243m--enable-inline�[0m
Testing DEFAULT: --enable-inline
[Pipeline] script
[Pipeline] {
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // catchError
[Pipeline] sh
make[4]: *** [Makefile:8887: test-suite.log] Error 1
make[3]: *** [Makefile:8995: check-TESTS] Error 2
make[2]: *** [Makefile:9239: check-am] Error 2
make[1]: *** [Makefile:8772: check-recursive] Error 1
make: *** [Makefile:9241: check] Error 2
�[1;38;5;243mFailure details:�[0m