drop now unused dispatch_imsg

switch to the more usual log.c

rename log.[ch] to logger.[ch]

provide a more usual fatal fatal usually appends the error string. Add 'fatalx' that doesn't. Fix callers and move the prototypes to log.h

log when the certificate was successfully generated

fmt

certificate generation (bugfix and improvement) don't add gmid as organisation when generating the certificate, and set the version to 3, so it's compatible with java/android clients. Found by Gnuserland, thanks!

list instead of fixed-size array for vhosts and locations saves some bytes of memory and removes the limit on the maximum number of vhosts and location blocks.

refactoring: imsg everywhere use imsg to handle ALL kinds of IPC in gmid. This simplifies and shorten the code, and makes everything more uniform too.

kill debug printf

fix various compilation errors Include gmid.h as first header in every file, as it then includes config.h (that defines _GNU_SOURCE for instance). Fix also a warning about unsigned vs signed const char pointers in openssl.

don't allocate BIGNUM on the stack on fedora 33 the BIGNUM type is opaque. Allocate always to avoid headaches.

add `require client ca' rule to require certs signed by a CA

improve logs management

reload configuration on SIGHUP