keys- and route- files weren't passing the should_ignore_file()
check in dir_changed() because should_ignore_file() was only
taking ifcfg- files into account. Generalize most of the ifcfg name
handling functions so that should_ignore_file() will now handle
all three variants.
Add testcases to ensure that the name handling does what we want
it to, and optimize memory usage of utils_get_ifcfg_name() a bit.
And remove cargo-culted internal stuff which is no longer needed.
The ifcfg-rh sha1 stuff wasn't even used anymore after the move to
certificate paths.
Overload the certificate and key properties to allow paths to the
certificates and keys using a special prefix for the property data.
Add API to libnm-util for easy certificate path handling, and
documentation for NMSetting8021x.
TLS uses the 'identity' which previously wasn't read. The private key
password should also only be used for PKCS#12 files, becuase they aren't
decrypted when read into the setting.
Private keys also need to be handled differently; PKCS#12 keys are written
out unchanged (ie, still encrypted) with their corresponding private key.
DER keys are stored in the setting unencrypted, so they are re-encrypted
before being written out to disk. But because the private key password
isn't known for DER keys, a random password must be used to re-encrypt
the key.
