UT / clsync

Fixes: https://github.com/xaionaro/clsync/issues/127

Barak's fixes for 0.4.1

Fixes: https://github.com/xaionaro/clsync/issues/121

Related: https://github.com/xaionaro/clsync/issues/124

Fixes: https://github.com/xaionaro/clsync/issues/122

Bug descritpion: The privileged helper process cannot die while
pthread_cond_wait().

Note: fixed, but not fully tested (it's hard to repeat the bug).

Clsync uses effective pid of "nobody" by default. In turn there's
no permission to create new files in /var/run on some systems under
the "nobody". So this patch uses "root" to create and fchown() the
file.

    Debug3 (pid: 19860; thread: 0x7f606105db40): main(): Trying to drop effective gid to 65533
    Debug3 (pid: 19860; thread: 0x7f606105db40): main(): Trying to drop effective uid to 65534
    Debug1 (pid: 19860; thread: 0x7f606105db40): main(): / [/] (0xf7eed0) -> rsync://********@**********/******* [***] (0xf7ba30)
    Warning (pid: 19860; thread: 0x7f606105db40): main(): Directory "/dev/shm/clsync" doesn't exist. Creating it.
    Debug2 (pid: 19860; thread: 0x7f606105db40): main(): Trying to open the pidfile "/var/run/clsync-backup.pid"
    Error (pid: 19860; thread: 0x7f606105db40): main(): Cannot open file "/var/run/clsync***.pid" to write a pid there (13: Permission denied)
    Debug3 (pid: 19860; thread: 0x7f606105db40): main(): Current errno is 13.
    Error (pid: 19860; thread: 0x7f606105db40): main(): Cannot unlink pidfile "/var/run/clsync***.pid" (2: No such file or directory)

Conflicts:
	debian/clsync-doc.install
	debian/control
	debian/libclsync0.install
	man/man1/clsync.1

Conflicts: (mainly take debian branch)
	debian/changelog
	debian/clsync-dev.install
	debian/clsync.install
	debian/control
	debian/libclsync-dev.install
	debian/rules

Closed the issue and updated the manpage

Function parse_customsignals() is adapted for atoi() and doesn't
work with xstrtol().

Temporary reversed xstrtol() to atoi() in this function